21231778984

Names of 21231778984

• Cardinal: 21231778984 can be written as Twenty-one billion, two hundred thirty-one million, seven hundred seventy-eight thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 2.1231778984 × 10¹⁰

Factors of 21231778984

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3430

Divisors of 21231778984

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 8 13 26 52 79 104 158 316 632 1027 1223 2054 2113 2446 4108 4226 4892 8216 8452 9784 15899 16904 27469 31798 54938 63596 96617 109876 127192 166927 193234 219752 333854 386468 667708 772936 1256021 1335416 2170051 2512042 2584199 4340102 5024084 5168398 8680204 10048168 10336796 17360408 20673592 33594587 67189174 134378348 204151721 268756696 408303442 816606884 1633213768 2653972373 5307944746 10615889492 21231778984
• Sum of all divisors σ(n): 43470604800
• Sum of proper divisors (its aliquot sum) s(n): 22238825816
• 21231778984 is an abundant number, because the sum of its proper divisors (22238825816) is greater than itself. Its abundance is 1007046832

Bases of 21231778984

• Binary: 10011110001100000110011110010101000₂
• Hexadecimal: 0x4F1833CA8
• Base-36: 9R4UPIG

Squares and roots of 21231778984

• 21231778984 squared (21231778984²) is 450788438825424072256
• 21231778984 cubed (21231778984³) is 9571040501683808462212638267904
• The square root of 21231778984 is 145711.2863988237
• The cube root of 21231778984 is 2769.0372298233

Scales and comparisons

• 21,231,778,984 seconds is equal to 675 years, 5 weeks, 3 days, 4 hours, 23 minutes, 4 seconds.
• To count from 1 to 21,231,778,984 would take you about one thousand, three hundred fifty 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 21231778984 cubic inches would be around 230.8 feet tall.

Recreational maths with 21231778984

• 21231778984 backwards is 48987713212
• 21231778984 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21231778984's digits is 52
• More coming soon!