Compare 19809 vs 19813
| Property | 19809 | 19813 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 32 × 311 × 711 | 198131 |
| Prime factorization | 3 × 3 × 31 × 71 | 19813 |
| Divisors count | 12 | 2 |
| Divisors | 1, 3, 9, 31, 71, 93, 213, 279, 639, 2201, 6603, 19809 | 1, 19813 |
| Number of properties | 0 | 6 |
| Emirps | 624th | |
| Harmonic primes | 811th | |
| Isolated primes | 1567th | |
| Primes | 2242nd | |
| Pythagorean primes | 1114th | |
| Sexy primes (1st member) | 689th | |
| Roman numberals | ||
| Base 2 | 1001101011000012 | 1001101011001012 |
| Base 3 | 10000112003 | 10000112113 |
| Base 4 | 103112014 | 103112114 |
| Base 5 | 11132145 | 11132235 |
| Base 6 | 2314136 | 2314216 |
| Base 7 | 1115167 | 1115237 |
| Base 8 | 465418 | 465458 |
| Base 9 | 301509 | 301549 |
| Base 10 | 1980910 | 1981310 |
| Base 11 | 1397911 | 1398211 |
| Base 12 | b56912 | b57112 |
| Base 13 | 902a13 | 903113 |
| Base 14 | 730d14 | 731314 |
| Base 15 | 5d0915 | 5d0d15 |
| Base 16 | 4d6116 | 4d6516 |