# 2 (number)English: 2

Pronunciation of the number 2
 ← 1 2 3 →
List of numbers — Integers
Cardinaltwo
Ordinal2nd (second / twoth)
Numeral systembinary
Factorizationprime
Gaussian integer factorization${\displaystyle (1+i)(1-i)}$
Prime1st
Divisors1, 2
Greek numeralΒ´
Roman numeralII
Roman numeral (unicode)Ⅱ, ⅱ
Greek prefixdi-
Latin prefixduo- bi-
Old English prefixtwi-
Binary102
Ternary23
Quaternary24
Quinary25
Senary26
Octal28
Duodecimal212
Vigesimal220
Base 36236
Greek numeralβ'
Arabic٢
Urdu
Ge'ez
Bengali
Chinese numeral二，弍，贰，貳
Devanāgarī
Telugu
Tamil
Hebrewב (Bet)
Khmer
Korean이，둘
Thai

2 (Two; / ()) is a number, numeral, and glyph. It is the number after 1 (one) and the number before 3 (three). In Roman numerals, it is II.

## In mathematics

Two has many meanings in math. For example: ${\displaystyle 1+1=2}$.[1] An integer is even if half of it equals an integer. If the last digit of a number is even, then the number is even. This means that if you multiply 2 times anything, it will end in 0, 2, 4, 6, or 8.

Two is the smallest, first, and only even prime number. The next prime number is three. Two and three are the only prime numbers next to each other. The even numbers above two are not prime because they are divisible by 2.

Fractions with 2 in the bottom do not yield infinite.

Two is the framework of the binary system used in computers. The binary way is the simplest system of numbers in which natural numbers (0-9) can be written.

Two also has the unique property that 2+2 = 2·2 = 22 and 2! + 2 = 22.

Powers of two are important to computer science.

The square root of two was the first known irrational number.

Other Languages
አማርኛ: ሁለት
Ænglisc: 2 (getæl)
العربية: 2 (عدد)
ܐܪܡܝܐ: 2 (ܡܢܝܢܐ)
অসমীয়া:
asturianu: Dos
Avañe'ẽ: Mokõi
авар: КӀиго
Aymar aru: Paya
azərbaycanca: 2 (ədəd)
تۆرکجه: ۲ (سایی)
Bân-lâm-gú: 2
башҡортса: 2 (һан)
беларуская: 2 (лік)
Bislama: Tu
български: 2 (число)
བོད་ཡིག: ༢ (གྲངས་ཀ།)
bosanski: 2 (broj)
brezhoneg: Daou
català: Dos
Чӑвашла: 2 (хисеп)
Cebuano: 2 (numero)
čeština: 2 (číslo)
chiShona: Piri
chiTumbuka: Vibili
Cymraeg: Dau
dansk: 2 (tal)
Deitsch: Zwee
Deutsch: Zwei
eesti: Kaks
Ελληνικά: 2 (αριθμός)
emiliàn e rumagnòl: 2 (nùmer)
English: 2
español: Dos
Esperanto: 2 (nombro)
estremeñu: Dos
euskara: Bi
فارسی: ۲ (عدد)
føroyskt: 2 (tal)
français: 2 (nombre)
Fulfulde: Ɗiɗi
furlan: 2 (numar)
Gaeilge: 2 (uimhir)
galego: Dous
ГӀалгӀай: 2 (таьрахь)

ગુજરાતી: ૨ (બે)

хальмг: 2
한국어: 2
Hausa: 2
հայերեն: 2 (թիվ)
हिन्दी:
hrvatski: Dva
Bahasa Hulontalo: 2
Igbo: Abụo
Bahasa Indonesia: 2 (angka)
interlingua: 2 (numero)
Iñupiak: Malġuk
isiXhosa: Zimbini
íslenska: Tveir
italiano: 2 (numero)
עברית: 2 (מספר)
ಕನ್ನಡ: ಎರಡು
ქართული: 2 (რიცხვი)
қазақша: 2 (сан)
Kinyarwanda: Kabiri
Kirundi: Kabiri
Kiswahili: Mbili
коми: 2 (кык)
Kreyòl ayisyen: 2 (nonm)
kurdî: Du
лакку: КӀива
Latina: Duo
latviešu: 2 (skaitlis)
Lëtzebuergesch: Zwee
lietuvių: 2 (skaičius)
Limburgs: Twieë
lingála: Míbalé
Luganda: Bbiri
lumbaart: Nümar 2
magyar: 2 (szám)
македонски: 2 (број)
മലയാളം: 2 (അക്കം)
მარგალური: ჟირი
Bahasa Melayu: 2 (nombor)
Mìng-dĕ̤ng-ngṳ̄: 2
монгол: Хоёр
မြန်မာဘာသာ:
Nāhuatl: Ōme
Na Vosa Vakaviti: Rua
Nederlands: 2 (getal)
Nedersaksies: 2 (getal)

Napulitano: Ddoje
нохчийн: Шиъ
Nordfriisk: Tau
norsk: 2 (tall)
norsk nynorsk: Talet 2
ଓଡ଼ିଆ: ୨ (ସଂଖ୍ୟା)
oʻzbekcha/ўзбекча: 2 (son)
پنجابی: 2
پښتو: ۲
Перем Коми: 2 (кык)
ភាសាខ្មែរ: ២ (លេខ)
polski: 2 (liczba)
português: Dois
română: 2 (cifră)
Runa Simi: Iskay
русский: 2 (число)
саха тыла: Икки (ахсаан)
ᱥᱟᱱᱛᱟᱲᱤ: ᱒ (ᱵᱟᱨ)
Gagana Samoa: Lua (numera)
Scots: 2 (nummer)
Sesotho sa Leboa: 2 (nomoro)
shqip: 2 (numër)
sicilianu: 2 (nùmmuru)
සිංහල: දෙක
slovenčina: 2 (číslo)
slovenščina: 2 (število)
ślůnski: 2 (nůmera)
Soomaaliga: 2 (tiro)
کوردی: ٢ (ژمارە)
Sranantongo: Numro 2
српски / srpski: 2 (број)
srpskohrvatski / српскохрватски: 2 (broj)
suomi: 2 (luku)
svenska: 2 (tal)
Tagalog: 2 (bilang)
தமிழ்: 2 (எண்)
татарча/tatarça: 2 (сан)
తెలుగు: రెండు
ไทย: 2
ትግርኛ: ክልተ
тоҷикӣ: 2 (адад)
Tshivenda: Mbili
Türkçe: 2 (sayı)
Türkmençe: 2 (san)
тыва дыл: 2
ᨅᨔ ᨕᨘᨁᨗ: 2 (nomoro)
українська: 2 (число)
اردو: 2 (عدد)
Vahcuengh: 2
vepsän kel’: 2 (lugu)
Tiếng Việt: 2 (số)

West-Vlams: 2 (getal)
Winaray: 2 (ihap)
Wolof: Ñaar

Xitsonga: Mbirhi
ייִדיש: 2 (נומער)
Yorùbá: 2 (nọ́mbà)