21164338290

Names of 21164338290

• Cardinal: 21164338290 can be written as Twenty-one billion, one hundred sixty-four million, three hundred thirty-eight thousand, two hundred ninety.

Scientific notation

• Scientific notation: 2.116433829 × 10¹⁰

Factors of 21164338290

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1624

Divisors of 21164338290

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 10 15 30 31 47 62 93 94 141 155 186 235 282 310 443 465 470 705 886 930 1093 1329 1410 1457 2186 2215 2658 2914 3279 4371 4430 5465 6558 6645 7285 8742 10930 13290 13733 14570 16395 20821 21855 27466 32790 33883 41199 41642 43710 51371 62463 67766 68665 82398 101649 102742 104105 124926 137330 154113 169415 203298 205995 208210 256855 308226 312315 338830 411990 484199 508245 513710 624630 645451 770565 968398 1016490 1290902 1452597 1541130 1592501 1936353 2420995 2905194 3185002 3227255 3872706 4777503 4841990 6454510 7262985 7962505 9555006 9681765 14525970 15010169 15925010 19363530 22757353 23887515 30020338 45030507 45514706 47775030 68272059 75050845 90061014 113786765 136544118 150101690 225152535 227573530 341360295 450305070 682720590 705477943 1410955886 2116433829 3527389715 4232867658 7054779430 10582169145 21164338290
• Sum of all divisors σ(n): 53718515712
• Sum of proper divisors (its aliquot sum) s(n): 32554177422
• 21164338290 is an abundant number, because the sum of its proper divisors (32554177422) is greater than itself. Its abundance is 11389839132

Bases of 21164338290

• Binary: 10011101101011111100010110001110010₂
• Hexadecimal: 0x4ED7E2C72
• Base-36: 9Q0P7XU

Squares and roots of 21164338290

• 21164338290 squared (21164338290²) is 447929215253560124100
• 21164338290 cubed (21164338290³) is 9480125441600574593306781789000
• The square root of 21164338290 is 145479.6834269307
• The cube root of 21164338290 is 2766.1022603617

Scales and comparisons

• 21,164,338,290 seconds is equal to 672 years, 49 weeks, 6 days, 14 hours, 51 minutes, 30 seconds.
• To count from 1 to 21,164,338,290 would take you about one thousand, three hundred forty-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 21164338290 cubic inches would be around 230.5 feet tall.

Recreational maths with 21164338290

• 21164338290 backwards is 09283346112
• The number of decimal digits it has is: 11
• The sum of 21164338290's digits is 39
• More coming soon!