| Decimal | 13 |
| Binary | 1101 |
| Hexadecimal | 0xd |
| Roman | XIII |
| Dotted decimal | 0.0.0.13 |
| Square root of | 169 |
| The number 13 | is prime! |
| English | thirteen |
| Wikipedia Article about 13 | Wikipedia Article about 13 |
| RGB Color | #00000d, |
| Number info: 13: ASCII code for | Carriage Return |
| random from 1 to 6 | Show |
| random from 1 to 10 | Show |
| random from 1 to 100 | Show |
| random from 1 to 1000 | Show |