19 (nineteen) is a number. It comes between eighteen and twenty, and is an odd number. It is also the 8th prime number, after 2, 3, 5, 7, 11, 13, and 17. In ordinal, it is written as 19th (nineteenth).
| ||||
|---|---|---|---|---|
| Cardinal | nineteen | |||
| Ordinal | 19th (nineteenth) | |||
| Factorization | prime | |||
| Prime | 8th | |||
| Divisors | 1, 19 | |||
| Greek numeral | ΙΘ´ | |||
| Roman numeral | XIX | |||
| Binary | 100112 | |||
| Ternary | 2013 | |||
| Quaternary | 1034 | |||
| Quinary | 345 | |||
| Senary | 316 | |||
| Octal | 238 | |||
| Duodecimal | 1712 | |||
| Hexadecimal | 1316 | |||
| Vigesimal | J20 | |||
| Base 36 | J36 | |||
In Roman numerals, 19 is written as XIX.
