21501257040

Names of 21501257040

• Cardinal: 21501257040 can be written as Twenty-one billion, five hundred one million, two hundred fifty-seven thousand and forty.

Scientific notation

• Scientific notation: 2.150125704 × 10¹⁰

Factors of 21501257040

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 29862867

Divisors of 21501257040

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 72 80 90 120 144 180 240 360 720 29862857 59725714 89588571 119451428 149314285 179177142 238902856 268765713 298628570 358354284 447942855 477805712 537531426 597257140 716708568 895885710 1075062852 1194514280 1343828565 1433417136 1791771420 2150125704 2389028560 2687657130 3583542840 4300251408 5375314260 7167085680 10750628520 21501257040
• Sum of all divisors σ(n): 72208390644
• Sum of proper divisors (its aliquot sum) s(n): 50707133604
• 21501257040 is an abundant number, because the sum of its proper divisors (50707133604) is greater than itself. Its abundance is 29205876564

Bases of 21501257040

• Binary: 10100000001100100110010010101010000₂
• Hexadecimal: 0x501932550
• Base-36: 9VLAK40

Squares and roots of 21501257040

• 21501257040 squared (21501257040²) is 462304054300149561600
• 21501257040 cubed (21501257040³) is 9940118302141633034404913664000
• The square root of 21501257040 is 146633.0693943219
• The cube root of 21501257040 is 2780.7030742491

Scales and comparisons

• 21,501,257,040 seconds is equal to 683 years, 35 weeks, 3 hours, 24 minutes.
• To count from 1 to 21,501,257,040 would take you about one thousand, three hundred sixty-seven 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 21501257040 cubic inches would be around 231.7 feet tall.

Recreational maths with 21501257040

• 21501257040 backwards is 04075210512
• The number of decimal digits it has is: 11
• The sum of 21501257040's digits is 27
• More coming soon!