Compare 20521 vs 20807
| Property | 20521 | 20807 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 205211 | 208071 |
| Prime factorization | 20521 | 20807 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20521 | 1, 20807 |
| Number of properties | 6 | 7 |
| Additive primes | 1090th | |
| Chen primes | 1140th | 1154th |
| Harmonic primes | 843rd | 858th |
| Isolated primes | 1619th | |
| Long primes | 890th | |
| Primes | 2316th | 2343rd |
| Pythagorean primes | 1153rd | |
| Twin primes (1st member) | 355th | |
| Ulam primes | 172nd | 174th |
| Roman numberals | ||
| Base 2 | 1010000001010012 | 1010001010001112 |
| Base 3 | 10010110013 | 10011121223 |
| Base 4 | 110002214 | 110110134 |
| Base 5 | 11240415 | 11312125 |
| Base 6 | 2350016 | 2401556 |
| Base 7 | 1135547 | 1144437 |
| Base 8 | 500518 | 505078 |
| Base 9 | 311319 | 314789 |
| Base 10 | 2052110 | 2080710 |
| Base 11 | 1446611 | 146a611 |
| Base 12 | ba6112 | 1005b12 |
| Base 13 | 945713 | 961713 |
| Base 14 | 769b14 | 782314 |
| Base 15 | 613115 | 627215 |
| Base 16 | 502916 | 514716 |