Compare 20921 vs 20981
| Property | 20921 | 20981 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 209211 | 209811 |
| Prime factorization | 20921 | 20981 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20921 | 1, 20981 |
| Number of properties | 5 | 5 |
| Chen primes | 1161st | |
| Good primes | 265th | |
| Harmonic primes | 864th | |
| Isolated primes | 1642nd | |
| Primes | 2353rd | 2359th |
| Pythagorean primes | 1170th | 1172nd |
| Sophie germain primes | 339th | |
| Twin primes (1st member) | 357th | |
| Roman numberals | ||
| Base 2 | 1010001101110012 | 1010001111101012 |
| Base 3 | 10012002123 | 10012100023 |
| Base 4 | 110123214 | 110133114 |
| Base 5 | 11321415 | 11324115 |
| Base 6 | 2405056 | 2410456 |
| Base 7 | 1146657 | 1151127 |
| Base 8 | 506718 | 507658 |
| Base 9 | 316259 | 317029 |
| Base 10 | 2092110 | 2098110 |
| Base 11 | 1479a11 | 1484411 |
| Base 12 | 1013512 | 1018512 |
| Base 13 | 96a413 | 971c13 |
| Base 14 | 78a514 | 790914 |
| Base 15 | 62eb15 | 633b15 |
| Base 16 | 51b916 | 51f516 |