21045137

Names of 21045137

• Cardinal: 21045137 can be written as Twenty-one million, forty-five thousand, one hundred thirty-seven.

Scientific notation

• Scientific notation: 2.1045137 × 10⁷

Factors of 21045137

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21045137

Divisors of 21045137

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21045137
• Sum of all divisors σ(n): 21045138
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21045137 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21045136

Bases of 21045137

• Binary: 1010000010001111110010001₂
• Hexadecimal: 0x1411F91
• Base-36: CJ2J5

Squares and roots of 21045137

• 21045137 squared (21045137²) is 442897791348769
• 21045137 cubed (21045137³) is 9320844695932258386353
• The square root of 21045137 is 4587.4979019067
• The cube root of 21045137 is 276.0899421563

Scales and comparisons

• 21,045,137 seconds is equal to 34 weeks, 5 days, 13 hours, 52 minutes, 17 seconds.
• To count from 1 to 21,045,137 would take you about eight hours!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21045137 cubic inches would be around 23 feet tall.

Recreational maths with 21045137

• 21045137 backwards is 73154012
• 21045137 is a twin prime! Its twin is 21045139
• The number of decimal digits it has is: 8
• The sum of 21045137's digits is 23
• More coming soon!