Compare 201913 vs 201919
| Property | 201913 | 201919 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 191 × 106271 | 2019191 |
| Prime factorization | 19 × 10627 | 201919 |
| Divisors count | 4 | 2 |
| Divisors | 1, 19, 10627, 201913 | 1, 201919 |
| Number of properties | 1 | 5 |
| Chen primes | 7585th | |
| Cousin primes (1st member) | 2154th | |
| Harmonic primes | 6809th | |
| Isolated primes | 13795th | |
| Primes | 18140th | |
| Semiprimes | 45644th | |
| Roman numberals | ||
| Base 2 | 1100010100101110012 | 1100010100101111112 |
| Base 3 | 1010202220213 | 1010202221113 |
| Base 4 | 3011023214 | 3011023334 |
| Base 5 | 224301235 | 224301345 |
| Base 6 | 41544416 | 41544516 |
| Base 7 | 15004457 | 15004547 |
| Base 8 | 6122718 | 6122778 |
| Base 9 | 3368679 | 3368749 |
| Base 10 | 20191310 | 20191910 |
| Base 11 | 12877811 | 12878311 |
| Base 12 | 98a2112 | 98a2712 |
| Base 13 | 70b9a13 | 70ba313 |
| Base 14 | 5382514 | 5382b14 |
| Base 15 | 3ec5d15 | 3ec6415 |
| Base 16 | 314b916 | 314bf16 |