21445247824

Names of 21445247824

• Cardinal: 21445247824 can be written as Twenty-one billion, four hundred forty-five million, two hundred forty-seven thousand, eight hundred twenty-four.

Scientific notation

• Scientific notation: 2.1445247824 × 10¹⁰

Factors of 21445247824

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 18963

Divisors of 21445247824

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 7 8 11 13 14 16 22 26 28 44 52 56 71 77 88 91 104 112 142 143 154 176 182 208 284 286 308 364 497 568 572 616 728 781 923 994 1001 1136 1144 1232 1456 1562 1846 1988 2002 2288 3124 3692 3976 4004 5467 6248 6461 7384 7952 8008 10153 10934 12496 12922 14768 16016 18859 20306 21868 25844 37718 40612 43736 51688 71071 75436 81224 87472 103376 132013 142142 150872 162448 207449 245167 264026 284284 301744 414898 490334 528052 568568 829796 980668 1056104 1137136 1338989 1452143 1659592 1716169 1961336 2112208 2677978 2696837 2904286 3319184 3432338 3922672 5355956 5393674 5808572 6864676 9372923 10711912 10787348 11617144 13729352 14728879 17406857 18745846 18877859 21423824 21574696 23234288 27458704 29457758 34813714 37491692 37755718 43149392 58915516 69627428 74983384 75511436 103102153 117831032 121847999 139254856 149966768 151022872 191475427 206204306 235662064 243695998 278509712 302045744 382950854 412408612 487391996 765901708 824817224 974783992 1340327989 1531803416 1649634448 1949567984 2680655978 3063606832 5361311956 10722623912 21445247824
• Sum of all divisors σ(n): 56576378880
• Sum of proper divisors (its aliquot sum) s(n): 35131131056
• 21445247824 is an abundant number, because the sum of its proper divisors (35131131056) is greater than itself. Its abundance is 13685883232

Bases of 21445247824

• Binary: 10011111110001111001000001101010000₂
• Hexadecimal: 0x4FE3C8350
• Base-36: 9UNY34G

Squares and roots of 21445247824

• 21445247824 squared (21445247824²) is 459898654232776734976
• 21445247824 cubed (21445247824³) is 9862640613945983665221888692224
• The square root of 21445247824 is 146441.9605987301
• The cube root of 21445247824 is 2778.2864646885

Scales and comparisons

• 21,445,247,824 seconds is equal to 681 years, 46 weeks, 2 days, 21 hours, 17 minutes, 4 seconds.
• To count from 1 to 21,445,247,824 would take you about one thousand, three hundred sixty-three 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 21445247824 cubic inches would be around 231.5 feet tall.

Recreational maths with 21445247824

• 21445247824 backwards is 42874254412
• The number of decimal digits it has is: 11
• The sum of 21445247824's digits is 43
• More coming soon!