21002792640

Names of 21002792640

• Cardinal: 21002792640 can be written as Twenty-one billion, two million, seven hundred ninety-two thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.100279264 × 10¹⁰

Factors of 21002792640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 5725

Divisors of 21002792640

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 31 32 40 48 60 62 64 80 93 96 120 124 127 155 160 186 192 240 248 254 310 320 372 381 465 480 496 508 620 635 744 762 930 960 992 1016 1240 1270 1488 1524 1860 1905 1984 2032 2480 2540 2976 3048 3720 3810 3937 4064 4960 5080 5557 5952 6096 7440 7620 7874 8128 9920 10160 11114 11811 12192 14880 15240 15748 16671 19685 20320 22228 23622 24384 27785 29760 30480 31496 33342 39370 40640 44456 47244 55570 59055 60960 62992 66684 78740 83355 88912 94488 111140 118110 121920 125984 133368 157480 166710 172267 177824 188976 222280 236220 251968 266736 314960 333420 344534 355648 377952 444560 472440 516801 533472 629920 666840 689068 705739 755904 861335 889120 944880 1033602 1066944 1259840 1333680 1378136 1411478 1722670 1778240 1889760 2067204 2117217 2584005 2667360 2756272 2822956 3445340 3528695 3779520 4134408 4234434 5168010 5334720 5512544 5645912 6890680 7057390 8268816 8468868 10336020 10586085 11025088 11291824 13781360 14114780 16537632 16937736 20672040 21172170 21877909 22583648 27562720 28229560 33075264 33875472 41344080 42344340 43755818 45167296 55125440 56459120 65633727 67750944 82688160 84688680 87511636 109389545 112918240 131267454 135501888 165376320 169377360 175023272 218779090 225836480 262534908 328168635 338754720 350046544 437558180 525069816 656337270 677509440 700093088 875116360 1050139632 1312674540 1400186176 1750232720 2100279264 2625349080 3500465440 4200558528 5250698160 7000930880 10501396320 21002792640
• Sum of all divisors σ(n): 69389451264
• Sum of proper divisors (its aliquot sum) s(n): 48386658624
• 21002792640 is an abundant number, because the sum of its proper divisors (48386658624) is greater than itself. Its abundance is 27383865984

Bases of 21002792640

• Binary: 10011100011110111010010111011000000₂
• Hexadecimal: 0x4E3DD2EC0
• Base-36: 9NCIQIO

Squares and roots of 21002792640

• 21002792640 squared (21002792640²) is 441117298678838169600
• 21002792640 cubed (21002792640³) is 9264695154068584032225951744000
• The square root of 21002792640 is 144923.4026649941
• The cube root of 21002792640 is 2759.0464675003

Scales and comparisons

• 21,002,792,640 seconds is equal to 667 years, 42 weeks, 5 days, 21 hours, 4 minutes.
• To count from 1 to 21,002,792,640 would take you about one thousand, three hundred thirty-five 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 21002792640 cubic inches would be around 229.9 feet tall.

Recreational maths with 21002792640

• 21002792640 backwards is 04629720012
• The number of decimal digits it has is: 11
• The sum of 21002792640's digits is 33
• More coming soon!