natural number From Wikipedia, the free encyclopedia

**17** (**seventeen**) is a number. It comes between sixteen and eighteen, and is an odd number. It is also the 7th prime number, after 2, 3, 5, 7, 11, and 13. In ordinal, It is 17th (seventeenth). In Italy, 17 is considered an unlucky number.

| ||||
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Cardinal | seventeen | |||

Ordinal | 17th (seventeenth) | |||

Numeral system | septendecimal | |||

Factorization | prime | |||

Prime | 7th | |||

Divisors | 1, 17 | |||

Greek numeral | ΙΖ´ | |||

Roman numeral | XVII | |||

Binary | 10001_{2} | |||

Ternary | 122_{3} | |||

Quaternary | 101_{4} | |||

Quinary | 32_{5} | |||

Senary | 25_{6} | |||

Octal | 21_{8} | |||

Duodecimal | 15_{12} | |||

Hexadecimal | 11_{16} | |||

Vigesimal | H_{20} | |||

Base 36 | H_{36} |

In Roman numerals, 17 is written as **XVII**.

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