How rare is 21?
21
稀有度分数25.0
神话百分位比全部数字中的 99.9% 更稀有
排行榜 EP26,833,728 EP
- Fibonacci number1 in 33,333 · +15.0 bits
- Digit sum 31 in 17,857 · +14.1 bits
- Triangular number1 in 707 · +9.5 bits
- Harshad number1 in 10 · +3.4 bits
- Semiprime1 in 5 · +2.3 bits
- Zero-free1 in 2 · +0.7 bits
- 数位和
- 3
- 数字根
- 3
- 奇偶性
- 奇数
What does that mean?
Scores are computed from exact trait counts across all 1,000,001 numbers from 0 to 1,000,000 — see the scoring formula and the pattern library for the traits behind this number.