| Decimal | 18 |
| Binary | 10010 |
| Hexadecimal | 0x12 |
| Roman | XVIII |
| Square root of | 324 |
| Factors | 3 3 2 |
| English | eighteen |
| Wikipedia article about 18 | Article about 18 |
| ASCII code for | Device Control 2 |
| random from 0 to 6 | Show |
| random from 0 to 10 | Show |
| random from 0 to 100 | Show |
| random from 0 to 1000 | Show |