21040163856

Names of 21040163856

• Cardinal: 21040163856 can be written as Twenty-one billion, forty million, one hundred sixty-three thousand, eight hundred fifty-six.

Scientific notation

• Scientific notation: 2.1040163856 × 10¹⁰

Factors of 21040163856

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 686049

Divisors of 21040163856

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 36 48 54 71 72 108 142 144 213 216 284 426 432 568 639 852 1136 1278 1704 1917 2556 3408 3834 5112 7668 10224 15336 30672 685973 1371946 2057919 2743892 4115838 5487784 6173757 8231676 10975568 12347514 16463352 18521271 24695028 32926704 37042542 48704083 49390056 74085084 97408166 98780112 146112249 148170168 194816332 292224498 296340336 389632664 438336747 584448996 779265328 876673494 1168897992 1315010241 1753346988 2337795984 2630020482 3506693976 5260040964 7013387952 10520081928 21040163856
• Sum of all divisors σ(n): 61243758720
• Sum of proper divisors (its aliquot sum) s(n): 40203594864
• 21040163856 is an abundant number, because the sum of its proper divisors (40203594864) is greater than itself. Its abundance is 19163431008

Bases of 21040163856

• Binary: 10011100110000101110110110000010000₂
• Hexadecimal: 0x4E6176C10
• Base-36: 9NYRQC0

Squares and roots of 21040163856

• 21040163856 squared (21040163856²) is 442688495087328788736
• 21040163856 cubed (21040163856³) is 9314238473803448744351447126016
• The square root of 21040163856 is 145052.2797338945
• The cube root of 21040163856 is 2760.6819297963

Scales and comparisons

• 21,040,163,856 seconds is equal to 669 years, 4 days, 9 hours, 57 minutes, 36 seconds.
• To count from 1 to 21,040,163,856 would take you about one thousand, three hundred thirty-eight 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 21040163856 cubic inches would be around 230.1 feet tall.

Recreational maths with 21040163856

• 21040163856 backwards is 65836104012
• 21040163856 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21040163856's digits is 36
• More coming soon!