Compare 201809 vs 202121
| Property | 201809 | 202121 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2018091 | 2021211 |
| Prime factorization | 201809 | 202121 |
| Divisors count | 2 | 2 |
| Divisors | 1, 201809 | 1, 202121 |
| Number of properties | 5 | 6 |
| Chen primes | 7580th | 7591st |
| Harmonic primes | 6807th | 6814th |
| Isolated primes | 13787th | 13812th |
| Primes | 18128th | 18159th |
| Pythagorean primes | 9049th | 9066th |
| Sexy primes (1st member) | 4332nd | |
| Roman numberals | ||
| Base 2 | 1100010100010100012 | 1100010101100010012 |
| Base 3 | 1010202111023 | 1010210202223 |
| Base 4 | 3011011014 | 3011120214 |
| Base 5 | 224242145 | 224314415 |
| Base 6 | 41541456 | 41554256 |
| Base 7 | 15002367 | 15011637 |
| Base 8 | 6121218 | 6126118 |
| Base 9 | 3367429 | 3372289 |
| Base 10 | 20180910 | 20212110 |
| Base 11 | 12869311 | 12894711 |
| Base 12 | 9895512 | 98b7512 |
| Base 13 | 70b1a13 | 70cca13 |
| Base 14 | 5378d14 | 5393314 |
| Base 15 | 3ebde15 | 3ed4b15 |
| Base 16 | 3145116 | 3158916 |