Compare 20917 vs 20921
| Property | 20917 | 20921 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 131 × 16091 | 209211 |
| Prime factorization | 13 × 1609 | 20921 |
| Divisors count | 4 | 2 |
| Divisors | 1, 13, 1609, 20917 | 1, 20921 |
| Number of properties | 1 | 5 |
| Harmonic primes | 864th | |
| Isolated primes | 1642nd | |
| Primes | 2353rd | |
| Pythagorean primes | 1170th | |
| Semiprimes | 5308th | |
| Sophie germain primes | 339th | |
| Roman numberals | ||
| Base 2 | 1010001101101012 | 1010001101110012 |
| Base 3 | 10012002013 | 10012002123 |
| Base 4 | 110123114 | 110123214 |
| Base 5 | 11321325 | 11321415 |
| Base 6 | 2405016 | 2405056 |
| Base 7 | 1146617 | 1146657 |
| Base 8 | 506658 | 506718 |
| Base 9 | 316219 | 316259 |
| Base 10 | 2091710 | 2092110 |
| Base 11 | 1479611 | 1479a11 |
| Base 12 | 1013112 | 1013512 |
| Base 13 | 96a013 | 96a413 |
| Base 14 | 78a114 | 78a514 |
| Base 15 | 62e715 | 62eb15 |
| Base 16 | 51b516 | 51b916 |