21291392520

Names of 21291392520

• Cardinal: 21291392520 can be written as Twenty-one billion, two hundred ninety-one million, three hundred ninety-two thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.129139252 × 10¹⁰

Factors of 21291392520

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3157

Divisors of 21291392520

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 127 163 180 254 326 360 381 489 508 635 652 762 815 978 1016 1143 1270 1304 1467 1524 1630 1905 1956 2286 2445 2540 2857 2934 3048 3260 3810 3912 4572 4890 5080 5714 5715 5868 6520 7335 7620 8571 9144 9780 11428 11430 11736 14285 14670 15240 17142 19560 20701 22856 22860 25713 28570 29340 34284 41402 42855 45720 51426 57140 58680 62103 68568 82804 85710 102852 103505 114280 124206 128565 165608 171420 186309 205704 207010 248412 257130 310515 342840 362839 372618 414020 465691 496824 514260 621030 725678 745236 828040 931382 931545 1028520 1088517 1242060 1397073 1451356 1490472 1814195 1862764 1863090 2177034 2328455 2484120 2794146 2902712 3265551 3628390 3725528 3726180 4191219 4354068 4656910 5442585 5588292 6531102 6985365 7256780 7452360 8382438 8708136 9313820 10885170 11176584 13062204 13970730 14513560 16327755 16764876 18627640 20956095 21770340 26124408 27941460 32655510 33529752 41912190 43540680 55882920 59142757 65311020 83824380 118285514 130622040 167648760 177428271 236571028 295713785 354856542 473142056 532284813 591427570 709713084 887141355 1064569626 1182855140 1419426168 1774282710 2129139252 2365710280 2661424065 3548565420 4258278504 5322848130 7097130840 10645696260 21291392520
• Sum of all divisors σ(n): 70194309120
• Sum of proper divisors (its aliquot sum) s(n): 48902916600
• 21291392520 is an abundant number, because the sum of its proper divisors (48902916600) is greater than itself. Its abundance is 27611524080

Bases of 21291392520

• Binary: 10011110101000100001101111000001000₂
• Hexadecimal: 0x4F510DE08
• Base-36: 9S4CFM0

Squares and roots of 21291392520

• 21291392520 squared (21291392520²) is 453323395440711950400
• 21291392520 cubed (21291392520³) is 9651886350827376524221171008000
• The square root of 21291392520 is 145915.7034729299
• The cube root of 21291392520 is 2771.6263965545

Scales and comparisons

• 21,291,392,520 seconds is equal to 677 years, 3 hours, 42 minutes.
• To count from 1 to 21,291,392,520 would take you about one thousand, three hundred fifty-four 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 21291392520 cubic inches would be around 231 feet tall.

Recreational maths with 21291392520

• 21291392520 backwards is 02529319212
• 21291392520 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21291392520's digits is 36
• More coming soon!