Compare 201921 vs 201923
| Property | 201921 | 201923 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 673071 | 2019231 |
| Prime factorization | 3 × 67307 | 201923 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 67307, 201921 | 1, 201923 |
| Number of properties | 1 | 4 |
| Additive primes | 7298th | |
| Cousin primes (2nd member) | 2154th | |
| Isolated primes | 13796th | |
| Primes | 18141st | |
| Semiprimes | 45647th | |
| Roman numberals | ||
| Base 2 | 1100010100110000012 | 1100010100110000112 |
| Base 3 | 1010202221203 | 1010202221223 |
| Base 4 | 3011030014 | 3011030034 |
| Base 5 | 224301415 | 224301435 |
| Base 6 | 41544536 | 41544556 |
| Base 7 | 15004567 | 15004617 |
| Base 8 | 6123018 | 6123038 |
| Base 9 | 3368769 | 3368789 |
| Base 10 | 20192110 | 20192310 |
| Base 11 | 12878511 | 12878711 |
| Base 12 | 98a2912 | 98a2b12 |
| Base 13 | 70ba513 | 70ba713 |
| Base 14 | 5382d14 | 5383114 |
| Base 15 | 3ec6615 | 3ec6815 |
| Base 16 | 314c116 | 314c316 |