Compare 21989 vs 21999
| Property | 21989 | 21999 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 19991 | 31 × 73331 |
| Prime factorization | 11 × 1999 | 3 × 7333 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 1999, 21989 | 1, 3, 7333, 21999 |
| Number of properties | 1 | 1 |
| Semiprimes | 5552nd | 5554th |
| Roman numberals | ||
| Base 2 | 1010101111001012 | 1010101111011112 |
| Base 3 | 10100111023 | 10100112103 |
| Base 4 | 111132114 | 111132334 |
| Base 5 | 12004245 | 12004445 |
| Base 6 | 2454456 | 2455036 |
| Base 7 | 1210527 | 1210657 |
| Base 8 | 527458 | 527578 |
| Base 9 | 331429 | 331539 |
| Base 10 | 2198910 | 2199910 |
| Base 11 | 1558011 | 1558a11 |
| Base 12 | 1088512 | 1089312 |
| Base 13 | a01613 | a02313 |
| Base 14 | 802914 | 803514 |
| Base 15 | 67ae15 | 67b915 |
| Base 16 | 55e516 | 55ef16 |