Compare 20389 vs 20391
| Property | 20389 | 20391 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 203891 | 31 × 71 × 9711 |
| Prime factorization | 20389 | 3 × 7 × 971 |
| Divisors count | 2 | 8 |
| Divisors | 1, 20389 | 1, 3, 7, 21, 971, 2913, 6797, 20391 |
| Number of properties | 5 | 0 |
| Cousin primes (1st member) | 351st | |
| Isolated primes | 1612th | |
| Primes | 2303rd | |
| Pythagorean primes | 1148th | |
| Ulam primes | 168th | |
| Roman numberals | ||
| Base 2 | 1001111101001012 | 1001111101001112 |
| Base 3 | 10002220113 | 10002220203 |
| Base 4 | 103322114 | 103322134 |
| Base 5 | 11230245 | 11230315 |
| Base 6 | 2342216 | 2342236 |
| Base 7 | 1133057 | 1133107 |
| Base 8 | 476458 | 476478 |
| Base 9 | 308649 | 308669 |
| Base 10 | 2038910 | 2039110 |
| Base 11 | 1435611 | 1435811 |
| Base 12 | b97112 | b97312 |
| Base 13 | 938513 | 938713 |
| Base 14 | 760514 | 760714 |
| Base 15 | 609415 | 609615 |
| Base 16 | 4fa516 | 4fa716 |