Compare 640018 vs 640027
| Property | 640018 | 640027 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 3200091 | 6400271 |
| Prime factorization | 2 × 320009 | 640027 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 320009, 640018 | 1, 640027 |
| Number of properties | 1 | 3 |
| Additive primes | 20352nd | |
| Isolated primes | 40815th | |
| Primes | 52078th | |
| Semiprimes | 137147th | |
| Roman numberals | ||
| Base 2 | 100111000100000100102 | 100111000100000110112 |
| Base 3 | 10121112211013 | 10121112212013 |
| Base 4 | 21301001024 | 21301001234 |
| Base 5 | 1304400335 | 1304401025 |
| Base 6 | 214150146 | 214150316 |
| Base 7 | 53036417 | 53036537 |
| Base 8 | 23420228 | 23420338 |
| Base 9 | 11748419 | 11748519 |
| Base 10 | 64001810 | 64002710 |
| Base 11 | 3a794511 | 3a795311 |
| Base 12 | 26a46a12 | 26a47712 |
| Base 13 | 19541213 | 19541b13 |
| Base 14 | 12935814 | 12936314 |
| Base 15 | c997d15 | c998715 |
| Base 16 | 9c41216 | 9c41b16 |