21321516918

Names of 21321516918

• Cardinal: 21321516918 can be written as Twenty-one billion, three hundred twenty-one million, five hundred sixteen thousand, nine hundred eighteen.

Scientific notation

• Scientific notation: 2.1321516918 × 10¹⁰

Factors of 21321516918

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 346

Divisors of 21321516918

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 6 13 26 37 39 41 74 78 82 83 111 123 166 167 169 222 246 249 334 338 481 498 501 507 533 962 1002 1014 1066 1079 1443 1517 1599 2158 2171 2886 3034 3071 3198 3237 3403 4342 4551 6142 6179 6253 6474 6513 6806 6847 6929 9102 9213 10209 12358 12506 13026 13694 13858 13861 14027 18426 18537 18759 19721 20418 20541 20787 27722 28054 28223 37074 37518 39442 39923 41082 41574 41583 42081 44239 56446 59163 79846 80327 83166 84162 84669 88478 89011 118326 119769 125911 132717 160654 169338 178022 180193 239538 240981 251822 253339 256373 265434 267033 360386 377733 481962 506678 512746 512857 518999 534066 540579 568301 575107 755466 760017 769119 1025714 1037998 1044251 1081158 1136602 1150214 1157143 1520034 1538238 1538571 1556997 1636843 1704903 1725321 2088502 2314286 2342509 3077142 3113994 3132753 3273686 3293407 3409806 3450642 3471429 4685018 4910529 6265506 6586814 6667141 6942858 7027527 7387913 9821058 9880221 13334282 14055054 14775826 19760442 20001423 21027137 21278959 22163739 40002846 42054274 42557918 42814291 44327478 63081411 63836877 85628582 86672833 96042869 126162822 127673754 128442873 173345666 192085738 256885746 260018499 273352781 288128607 520036998 546705562 576257214 820058343 1640116686 3553586153 7107172306 10660758459 21321516918
• Sum of all divisors σ(n): 49459963392
• Sum of proper divisors (its aliquot sum) s(n): 28138446474
• 21321516918 is an abundant number, because the sum of its proper divisors (28138446474) is greater than itself. Its abundance is 6816929556

Bases of 21321516918

• Binary: 10011110110110111001000011101110110₂
• Hexadecimal: 0x4F6DC8776
• Base-36: 9SMA3QU

Squares and roots of 21321516918

• 21321516918 squared (21321516918²) is 454607083684560218724
• 21321516918 cubed (21321516918³) is 9692912625822992478913546372632
• The square root of 21321516918 is 146018.8923324649
• The cube root of 21321516918 is 2772.9329375303

Scales and comparisons

• 21,321,516,918 seconds is equal to 677 years, 49 weeks, 5 days, 19 hours, 35 minutes, 18 seconds.
• To count from 1 to 21,321,516,918 would take you about one thousand, three hundred fifty-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 21321516918 cubic inches would be around 231.1 feet tall.

Recreational maths with 21321516918

• 21321516918 backwards is 81961512312
• 21321516918 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21321516918's digits is 39
• More coming soon!