Compare 19813 vs 19821
| Property | 19813 | 19821 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 198131 | 31 × 66071 |
| Prime factorization | 19813 | 3 × 6607 |
| Divisors count | 2 | 4 |
| Divisors | 1, 19813 | 1, 3, 6607, 19821 |
| Number of properties | 6 | 1 |
| Emirps | 624th | |
| Harmonic primes | 811th | |
| Isolated primes | 1567th | |
| Primes | 2242nd | |
| Pythagorean primes | 1114th | |
| Semiprimes | 5043rd | |
| Sexy primes (1st member) | 689th | |
| Roman numberals | ||
| Base 2 | 1001101011001012 | 1001101011011012 |
| Base 3 | 10000112113 | 10000120103 |
| Base 4 | 103112114 | 103112314 |
| Base 5 | 11132235 | 11132415 |
| Base 6 | 2314216 | 2314336 |
| Base 7 | 1115237 | 1115347 |
| Base 8 | 465458 | 465558 |
| Base 9 | 301549 | 301639 |
| Base 10 | 1981310 | 1982110 |
| Base 11 | 1398211 | 1398a11 |
| Base 12 | b57112 | b57912 |
| Base 13 | 903113 | 903913 |
| Base 14 | 731314 | 731b14 |
| Base 15 | 5d0d15 | 5d1615 |
| Base 16 | 4d6516 | 4d6d16 |