21569472990

Names of 21569472990

• Cardinal: 21569472990 can be written as Twenty-one billion, five hundred sixty-nine million, four hundred seventy-two thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.156947299 × 10¹⁰

Factors of 21569472990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 150

Divisors of 21569472990

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 27 30 39 45 54 65 78 81 90 117 127 130 135 162 195 234 254 270 351 381 390 405 585 635 702 762 810 1053 1143 1170 1270 1651 1755 1905 2106 2286 3302 3429 3510 3810 4953 5265 5715 6858 8255 9906 10287 10530 11430 14859 16129 16510 17145 20574 24765 29718 32258 34290 44577 48387 49530 51435 74295 80645 89154 96774 102870 133731 145161 148590 161290 209677 222885 241935 267462 290322 419354 435483 445770 483870 629031 668655 725805 870966 1048385 1258062 1306449 1337310 1451610 1887093 2048383 2096770 2177415 2612898 3145155 3774186 4096766 4354830 5661279 6145149 6290310 6532245 9435465 10241915 11322558 12290298 13064490 16983837 18435447 18870930 20483830 26628979 28306395 30725745 33967674 36870894 53257958 55306341 56612790 61451490 79886937 84919185 92177235 110612682 133144895 159773874 165919023 169838370 184354470 239660811 266289790 276531705 331838046 399434685 479321622 553063410 718982433 798869370 829595115 1198304055 1437964866 1659190230 2156947299 2396608110 3594912165 4313894598 7189824330 10784736495 21569472990
• Sum of all divisors σ(n): 62955002880
• Sum of proper divisors (its aliquot sum) s(n): 41385529890
• 21569472990 is an abundant number, because the sum of its proper divisors (41385529890) is greater than itself. Its abundance is 19816056900

Bases of 21569472990

• Binary: 10100000101101001000000100111011110₂
• Hexadecimal: 0x505A409DE
• Base-36: 9WPWNVI

Squares and roots of 21569472990

• 21569472990 squared (21569472990²) is 465242165066339540100
• 21569472990 cubed (21569472990³) is 10035028313207532268355971899000
• The square root of 21569472990 is 146865.4928497501
• The cube root of 21569472990 is 2783.6407017179

Scales and comparisons

• 21,569,472,990 seconds is equal to 685 years, 43 weeks, 5 days, 16 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,569,472,990 would take you about one thousand, three hundred seventy-one 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 21569472990 cubic inches would be around 232 feet tall.

Recreational maths with 21569472990

• 21569472990 backwards is 09927496512
• 21569472990 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21569472990's digits is 54
• More coming soon!