20742815821

Names of 20742815821

• Cardinal: 20742815821 can be written as Twenty billion, seven hundred forty-two million, eight hundred fifteen thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 2.0742815821 × 10¹⁰

Factors of 20742815821

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1070

Divisors of 20742815821

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 13 31 61 91 149 217 403 427 793 809 1043 1891 1937 2821 4619 5551 5663 9089 10517 13237 13559 24583 25079 32333 49349 60047 63623 73619 118157 120541 172081 175553 281759 326027 345443 420329 641537 827099 843787 1529819 1567033 1972313 2282189 3662867 3736771 4490759 7353001 10708733 10969231 19887647 25640069 26157397 48578023 51471007 95589013 139213529 227943031 340046161 669123091 1595601217 2963259403 20742815821
• Sum of all divisors σ(n): 26998272000
• Sum of proper divisors (its aliquot sum) s(n): 6255456179
• 20742815821 is a deficient number, because the sum of its proper divisors (6255456179) is less than itself. Its deficiency is 14487359642

Bases of 20742815821

• Binary: 10011010100010111100100000001001101₂
• Hexadecimal: 0x4D45E404D
• Base-36: 9J1QJ4D

Squares and roots of 20742815821

• 20742815821 squared (20742815821²) is 430264408183927904041
• 20742815821 cubed (20742815821³) is 8924895373290781605865024632661
• The square root of 20742815821 is 144023.6641007303
• The cube root of 20742815821 is 2747.6151586977

Scales and comparisons

• 20,742,815,821 seconds is equal to 659 years, 28 weeks, 6 days, 21 hours, 17 minutes, 1 second.
• To count from 1 to 20,742,815,821 would take you about one thousand, three hundred nineteen 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 20742815821 cubic inches would be around 229 feet tall.

Recreational maths with 20742815821

• 20742815821 backwards is 12851824702
• The number of decimal digits it has is: 11
• The sum of 20742815821's digits is 40
• More coming soon!