Compare 20509 vs 20518
| Property | 20509 | 20518 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 205091 | 21 × 102591 |
| Prime factorization | 20509 | 2 × 10259 |
| Divisors count | 2 | 4 |
| Divisors | 1, 20509 | 1, 2, 10259, 20518 |
| Number of properties | 5 | 1 |
| Long primes | 882nd | |
| Lucky primes | 375th | |
| Primes | 2315th | |
| Pythagorean primes | 1152nd | |
| Semiprimes | 5207th | |
| Twin primes (2nd member) | 349th | |
| Roman numberals | ||
| Base 2 | 1010000000111012 | 1010000001001102 |
| Base 3 | 10010101213 | 10010102213 |
| Base 4 | 110001314 | 110002124 |
| Base 5 | 11240145 | 11240335 |
| Base 6 | 2345416 | 2345546 |
| Base 7 | 1135367 | 1135517 |
| Base 8 | 500358 | 500468 |
| Base 9 | 311179 | 311279 |
| Base 10 | 2050910 | 2051810 |
| Base 11 | 1445511 | 1446311 |
| Base 12 | ba5112 | ba5a12 |
| Base 13 | 944813 | 945413 |
| Base 14 | 768d14 | 769814 |
| Base 15 | 612415 | 612d15 |
| Base 16 | 501d16 | 502616 |