21291409568

Names of 21291409568

• Cardinal: 21291409568 can be written as Twenty-one billion, two hundred ninety-one million, four hundred nine thousand, five hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1291409568 × 10¹⁰

Factors of 21291409568

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 97

Divisors of 21291409568

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 8 11 13 16 22 26 32 44 52 71 88 104 142 143 169 176 208 284 286 338 352 416 568 572 676 781 923 1136 1144 1352 1562 1846 1859 2272 2288 2704 3124 3692 3718 4576 5041 5408 6248 7384 7436 10082 10153 11999 12496 14768 14872 20164 20306 23998 24992 29536 29744 40328 40612 47996 55451 59488 65533 80656 81224 95992 110902 131066 131989 161312 162448 191984 221804 262132 263978 324896 357911 383968 443608 524264 527956 715822 720863 851929 887216 1048528 1055912 1431644 1441726 1703858 1774432 2097056 2111824 2863288 2883452 3407716 3937021 4223648 4652843 5726576 5766904 6815432 7874042 9305686 9371219 11453152 11533808 13630864 15748084 18611372 18742438 23067616 27261728 31496168 37222744 37484876 51181273 60486959 62992336 74445488 74969752 102362546 120973918 125984672 148890976 149939504 204725092 241947836 299879008 409450184 483895672 665356549 818900368 967791344 1330713098 1637800736 1935582688 2661426196 5322852392 10645704784 21291409568
• Sum of all divisors σ(n): 50223644352
• Sum of proper divisors (its aliquot sum) s(n): 28932234784
• 21291409568 is an abundant number, because the sum of its proper divisors (28932234784) is greater than itself. Its abundance is 7640825216

Bases of 21291409568

• Binary: 10011110101000100010010000010100000₂
• Hexadecimal: 0x4F51120A0
• Base-36: 9S4CSRK

Squares and roots of 21291409568

• 21291409568 squared (21291409568²) is 453324121392321946624
• 21291409568 cubed (21291409568³) is 9651909535617676976086618898432
• The square root of 21291409568 is 145915.7618902085
• The cube root of 21291409568 is 2771.6271363007

Scales and comparisons

• 21,291,409,568 seconds is equal to 677 years, 8 hours, 26 minutes, 8 seconds.
• To count from 1 to 21,291,409,568 would take you about one thousand, three hundred fifty-four 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 21291409568 cubic inches would be around 231 feet tall.

Recreational maths with 21291409568

• 21291409568 backwards is 86590419212
• The number of decimal digits it has is: 11
• The sum of 21291409568's digits is 47
• More coming soon!