21002212940

Names of 21002212940

• Cardinal: 21002212940 can be written as Twenty-one billion, two million, two hundred twelve thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.100221294 × 10¹⁰

Factors of 21002212940

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 141

Divisors of 21002212940

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 10 20 31 62 103 124 155 206 310 412 515 620 961 1030 1922 2060 3193 3844 4805 6386 9610 10609 12772 15965 19220 21218 31930 42436 53045 63860 98983 106090 197966 212180 328879 395932 494915 657758 989830 1092727 1315516 1644395 1979660 2185454 3288790 4370908 5463635 6577580 10195249 10927270 20390498 21854540 33874537 40780996 50976245 67749074 101952490 135498148 169372685 203904980 338745370 677490740 1050110647 2100221294 4200442588 5250553235 10501106470 21002212940
• Sum of all divisors σ(n): 46020068640
• Sum of proper divisors (its aliquot sum) s(n): 25017855700
• 21002212940 is an abundant number, because the sum of its proper divisors (25017855700) is greater than itself. Its abundance is 4015642760

Bases of 21002212940

• Binary: 10011100011110101000101011001001100₂
• Hexadecimal: 0x4E3D4564C
• Base-36: 9NC6B7W

Squares and roots of 21002212940

• 21002212940 squared (21002212940²) is 441092948377103443600
• 21002212940 cubed (21002212940³) is 9263928028148353942894480184000
• The square root of 21002212940 is 144921.4026291493
• The cube root of 21002212940 is 2759.0210830355

Scales and comparisons

• 21,002,212,940 seconds is equal to 667 years, 41 weeks, 6 days, 4 hours, 2 minutes, 20 seconds.
• To count from 1 to 21,002,212,940 would take you about one thousand, three hundred thirty-five years!

  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 21002212940 cubic inches would be around 229.9 feet tall.

Recreational maths with 21002212940

• 21002212940 backwards is 04921220012
• The number of decimal digits it has is: 11
• The sum of 21002212940's digits is 23
• More coming soon!