21261398340

Names of 21261398340

• Cardinal: 21261398340 can be written as Twenty-one billion, two hundred sixty-one million, three hundred ninety-eight thousand, three hundred forty.

Scientific notation

• Scientific notation: 2.126139834 × 10¹⁰

Factors of 21261398340

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3894059

Divisors of 21261398340

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 13 14 15 20 21 26 28 30 35 39 42 52 60 65 70 78 84 91 105 130 140 156 182 195 210 260 273 364 390 420 455 546 780 910 1092 1365 1820 2730 5460 3894029 7788058 11682087 15576116 19470145 23364174 27258203 38940290 46728348 50622377 54516406 58410435 77880580 81774609 101244754 109032812 116820870 136291015 151867131 163549218 202489508 233641740 253111885 272582030 303734262 327098436 354356639 408873045 506223770 545164060 607468524 708713278 759335655 817746090 1012447540 1063069917 1417426556 1518671310 1635492180 1771783195 2126139834 3037342620 3543566390 4252279668 5315349585 7087132780 10630699170 21261398340
• Sum of all divisors σ(n): 73270068480
• Sum of proper divisors (its aliquot sum) s(n): 52008670140
• 21261398340 is an abundant number, because the sum of its proper divisors (52008670140) is greater than itself. Its abundance is 30747271800

Bases of 21261398340

• Binary: 10011110011010001110011000101000100₂
• Hexadecimal: 0x4F3473144
• Base-36: 9RMHJYC

Squares and roots of 21261398340

• 21261398340 squared (21261398340²) is 452047059372154755600
• 21261398340 cubed (21261398340³) is 9611152597737012562936945704000
• The square root of 21261398340 is 145812.8881134997
• The cube root of 21261398340 is 2770.3242783527

Scales and comparisons

• 21,261,398,340 seconds is equal to 676 years, 2 weeks, 2 days, 23 hours, 59 minutes.
• To count from 1 to 21,261,398,340 would take you about one thousand, three hundred fifty-two 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 21261398340 cubic inches would be around 230.9 feet tall.

Recreational maths with 21261398340

• 21261398340 backwards is 04389316212
• 21261398340 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21261398340's digits is 39
• More coming soon!