21531574890

Names of 21531574890

• Cardinal: 21531574890 can be written as Twenty-one billion, five hundred thirty-one million, five hundred seventy-four thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.153157489 × 10¹⁰

Factors of 21531574890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 93

Divisors of 21531574890

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 23 30 35 42 45 46 53 63 69 70 90 105 106 115 126 138 159 161 207 210 230 265 315 318 322 345 371 414 477 483 529 530 630 690 742 795 805 954 966 1035 1058 1113 1219 1449 1587 1590 1610 1855 2070 2226 2385 2415 2438 2645 2809 2898 3174 3339 3657 3703 3710 4761 4770 4830 5290 5565 5618 6095 6678 7245 7314 7406 7935 8427 8533 9522 10971 11109 11130 12167 12190 14045 14490 15870 16695 16854 17066 18285 18515 19663 21942 22218 23805 24334 25281 25599 28037 28090 33327 33390 36501 36570 37030 39326 42135 42665 47610 50562 51198 54855 55545 56074 58989 60835 64607 66654 73002 76797 84111 84270 85169 85330 98315 109503 109710 111090 117978 121670 126405 127995 129214 140185 153594 166635 168222 170338 176967 182505 193821 196259 196630 219006 252333 252810 255507 255990 280370 294945 323035 333270 353934 365010 383985 387642 392518 420555 425845 452249 504666 511014 547515 581463 588777 589890 644851 646070 766521 767970 841110 851690 884835 904498 969105 981295 1095030 1162926 1177554 1261665 1277535 1289702 1356747 1485961 1533042 1766331 1769670 1934553 1938210 1962590 2261245 2523330 2555070 2713494 2907315 2943885 2971922 3224255 3532662 3832605 3869106 4070241 4457883 4513957 4522490 5803659 5814630 5887770 6448510 6783735 7429805 7665210 8140482 8831655 8915766 9027914 9672765 10401727 11607318 13373649 13541871 13567470 14859610 17663310 19345530 20351205 20803454 22289415 22569785 26747298 27083742 29018295 31205181 34177103 40625613 40702410 44578830 45139570 52008635 58036590 62410362 66868245 67709355 68354206 81251226 93615543 102531309 104017270 133736490 135418710 156025905 170885515 187231086 203128065 205062618 239239721 307593927 312051810 341771030 406256130 468077715 478479442 512656545 615187854 717719163 936155430 1025313090 1196198605 1435438326 1537969635 2153157489 2392397210 3075939270 3588595815 4306314978 7177191630 10765787445 21531574890
• Sum of all divisors σ(n): 68173297920
• Sum of proper divisors (its aliquot sum) s(n): 46641723030
• 21531574890 is an abundant number, because the sum of its proper divisors (46641723030) is greater than itself. Its abundance is 25110148140

Bases of 21531574890

• Binary: 10100000011011000011100001001101010₂
• Hexadecimal: 0x50361C26A
• Base-36: 9W3CDII

Squares and roots of 21531574890

• 21531574890 squared (21531574890²) is 463608717243678512100
• 21531574890 cubed (21531574890³) is 9982225814989098262364921169000
• The square root of 21531574890 is 146736.4129655621
• The cube root of 21531574890 is 2782.0094373271

Scales and comparisons

• 21,531,574,890 seconds is equal to 684 years, 33 weeks, 1 day, 1 hour, 1 minute, 30 seconds.
• To count from 1 to 21,531,574,890 would take you about one thousand, three hundred sixty-nine 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 21531574890 cubic inches would be around 231.8 feet tall.

Recreational maths with 21531574890

• 21531574890 backwards is 09847513512
• 21531574890 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21531574890's digits is 45
• More coming soon!