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# 12 (number)

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Cardinal | twelve | |||

Ordinal | 12th (twelfth) | |||

Factorization | 2^{2}· 3 | |||

Roman numeral | XII | |||

Greek prefix | dodeca-/dodeka- | |||

Latin prefix | duodeca- | |||

Binary | 1100_{2} | |||

Ternary | 110_{3} | |||

Quaternary | 30_{4} | |||

Quinary | 22_{5} | |||

Senary | 20_{6} | |||

Octal | 14_{8} | |||

Duodecimal | 10_{12} | |||

Hexadecimal | C_{16} | |||

Vigesimal | C_{20} | |||

Base 36 | C_{36} |

This article is about the number twelve. For the year, see 12.

**Twelve** is a number. It comes between eleven and thirteen, and it is an even number. It is divisible by 1, 2, 3, 4, 6, and 12. Its ordinal is 12th (twelfth). In Roman numerals, it is written as **XII**. It is the base of duodecimal numbers.

## Mathematics

- Twelve is the first abundant number.
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