20721002940

Names of 20721002940

• Cardinal: 20721002940 can be written as Twenty billion, seven hundred twenty-one million, two thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.072100294 × 10¹⁰

Factors of 20721002940

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 10465174

Divisors of 20721002940

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 30 33 36 44 45 55 60 66 90 99 110 132 165 180 198 220 330 396 495 660 990 1980 10465153 20930306 31395459 41860612 52325765 62790918 94186377 104651530 115116683 125581836 156977295 188372754 209303060 230233366 313954590 345350049 376745508 460466732 470931885 575583415 627909180 690700098 941863770 1036050147 1151166830 1381400196 1726750245 1883727540 2072100294 2302333660 3453500490 4144200588 5180250735 6907000980 10360501470 20721002940
• Sum of all divisors σ(n): 68567689008
• Sum of proper divisors (its aliquot sum) s(n): 47846686068
• 20721002940 is an abundant number, because the sum of its proper divisors (47846686068) is greater than itself. Its abundance is 27125683128

Bases of 20721002940

• Binary: 10011010011000100010110100110111100₂
• Hexadecimal: 0x4D31169BC
• Base-36: 9IOR070

Squares and roots of 20721002940

• 20721002940 squared (20721002940²) is 429359962839488643600
• 20721002940 cubed (20721002940³) is 8896769052315334932132212184000
• The square root of 20721002940 is 143947.9174562799
• The cube root of 20721002940 is 2746.6517018605

Scales and comparisons

• 20,721,002,940 seconds is equal to 658 years, 44 weeks, 6 days, 10 hours, 9 minutes.
• To count from 1 to 20,721,002,940 would take you about one thousand, three hundred seventeen 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 20721002940 cubic inches would be around 228.9 feet tall.

Recreational maths with 20721002940

• 20721002940 backwards is 04920012702
• The number of decimal digits it has is: 11
• The sum of 20721002940's digits is 27
• More coming soon!