Compare 20809 vs 20813
| Property | 20809 | 20813 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 208091 | 131 × 16011 |
| Prime factorization | 20809 | 13 × 1601 |
| Divisors count | 2 | 4 |
| Divisors | 1, 20809 | 1, 13, 1601, 20813 |
| Number of properties | 5 | 1 |
| Additive primes | 1091st | |
| Harmonic primes | 859th | |
| Primes | 2344th | |
| Pythagorean primes | 1165th | |
| Semiprimes | 5281st | |
| Twin primes (2nd member) | 355th | |
| Roman numberals | ||
| Base 2 | 1010001010010012 | 1010001010011012 |
| Base 3 | 10011122013 | 10011122123 |
| Base 4 | 110110214 | 110110314 |
| Base 5 | 11312145 | 11312235 |
| Base 6 | 2402016 | 2402056 |
| Base 7 | 1144457 | 1144527 |
| Base 8 | 505118 | 505158 |
| Base 9 | 314819 | 314859 |
| Base 10 | 2080910 | 2081310 |
| Base 11 | 146a811 | 1470111 |
| Base 12 | 1006112 | 1006512 |
| Base 13 | 961913 | 962013 |
| Base 14 | 782514 | 782914 |
| Base 15 | 627415 | 627815 |
| Base 16 | 514916 | 514d16 |