Compare 20909 vs 20921
| Property | 20909 | 20921 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 71 × 291 × 1031 | 209211 |
| Prime factorization | 7 × 29 × 103 | 20921 |
| Divisors count | 8 | 2 |
| Divisors | 1, 7, 29, 103, 203, 721, 2987, 20909 | 1, 20921 |
| Number of properties | 0 | 5 |
| Harmonic primes | 864th | |
| Isolated primes | 1642nd | |
| Primes | 2353rd | |
| Pythagorean primes | 1170th | |
| Sophie germain primes | 339th | |
| Roman numberals | ||
| Base 2 | 1010001101011012 | 1010001101110012 |
| Base 3 | 10012001023 | 10012002123 |
| Base 4 | 110122314 | 110123214 |
| Base 5 | 11321145 | 11321415 |
| Base 6 | 2404456 | 2405056 |
| Base 7 | 1146507 | 1146657 |
| Base 8 | 506558 | 506718 |
| Base 9 | 316129 | 316259 |
| Base 10 | 2090910 | 2092110 |
| Base 11 | 1478911 | 1479a11 |
| Base 12 | 1012512 | 1013512 |
| Base 13 | 969513 | 96a413 |
| Base 14 | 789714 | 78a514 |
| Base 15 | 62de15 | 62eb15 |
| Base 16 | 51ad16 | 51b916 |