Compare 21661 vs 21863
| Property | 21661 | 21863 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 216611 | 218631 |
| Prime factorization | 21661 | 21863 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21661 | 1, 21863 |
| Number of properties | 4 | 7 |
| Chen primes | 1203rd | |
| Cousin primes (2nd member) | 373rd | |
| Harmonic primes | 894th | 904th |
| Isolated primes | 1693rd | 1710th |
| Long primes | 929th | |
| Primes | 2432nd | 2453rd |
| Pythagorean primes | 1207th | |
| Ulam primes | 183rd | |
| Roman numberals | ||
| Base 2 | 1010100100111012 | 1010101011001112 |
| Base 3 | 10022010213 | 10022222023 |
| Base 4 | 111021314 | 111112134 |
| Base 5 | 11431215 | 11444235 |
| Base 6 | 2441416 | 2451156 |
| Base 7 | 1201037 | 1205127 |
| Base 8 | 522358 | 525478 |
| Base 9 | 326379 | 328829 |
| Base 10 | 2166110 | 2186310 |
| Base 11 | 1530211 | 1547611 |
| Base 12 | 1065112 | 1079b12 |
| Base 13 | 9b2313 | 9c4a13 |
| Base 14 | 7c7314 | 7d7914 |
| Base 15 | 664115 | 672815 |
| Base 16 | 549d16 | 556716 |