Compare 2009 vs 2020
| Property | 2009 | 2020 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 3 | 4 |
| Prime factorization | 72 × 411 | 22 × 51 × 1011 |
| Prime factorization | 7 × 7 × 41 | 2 × 2 × 5 × 101 |
| Divisors count | 6 | 12 |
| Divisors | 1, 7, 41, 49, 287, 2009 | 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020 |
| Number of properties | 0 | 0 |
| Roman numberals | MMIX | MMXX |
| Base 2 | 111110110012 | 111111001002 |
| Base 3 | 22021023 | 22022113 |
| Base 4 | 1331214 | 1332104 |
| Base 5 | 310145 | 310405 |
| Base 6 | 131456 | 132046 |
| Base 7 | 56007 | 56147 |
| Base 8 | 37318 | 37448 |
| Base 9 | 26729 | 26849 |
| Base 10 | 200910 | 202010 |
| Base 11 | 156711 | 157711 |
| Base 12 | 11b512 | 120412 |
| Base 13 | bb713 | bc513 |
| Base 14 | a3714 | a4414 |
| Base 15 | 8de15 | 8ea15 |
| Base 16 | 7d916 | 7e416 |