Compare 18 vs 20
| Property | 18 | 20 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 2 |
| Total factors | 3 | 3 |
| Prime factorization | 21 × 32 | 22 × 51 |
| Prime factorization | 2 × 3 × 3 | 2 × 2 × 5 |
| Divisors count | 6 | 6 |
| Divisors | 1, 2, 3, 6, 9, 18 | 1, 2, 4, 5, 10, 20 |
| Number of properties | 0 | 0 |
| Roman numberals | XVIII | XX |
| Base 2 | 100102 | 101002 |
| Base 3 | 2003 | 2023 |
| Base 4 | 1024 | 1104 |
| Base 5 | 335 | 405 |
| Base 6 | 306 | 326 |
| Base 7 | 247 | 267 |
| Base 8 | 228 | 248 |
| Base 9 | 209 | 229 |
| Base 10 | 1810 | 2010 |
| Base 11 | 1711 | 1911 |
| Base 12 | 1612 | 1812 |
| Base 13 | 1513 | 1713 |
| Base 14 | 1414 | 1614 |
| Base 15 | 1315 | 1515 |
| Base 16 | 1216 | 1416 |