21021065838

Names of 21021065838

• Cardinal: 21021065838 can be written as Twenty-one billion, twenty-one million, sixty-five thousand, eight hundred thirty-eight.

Scientific notation

• Scientific notation: 2.1021065838 × 10¹⁰

Factors of 21021065838

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 288

Divisors of 21021065838

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 9 18 27 31 54 62 73 93 146 179 186 219 279 358 438 537 558 657 837 961 1074 1314 1611 1674 1922 1971 2263 2883 3222 3942 4526 4833 5549 5766 6789 8649 9666 11098 13067 13578 16647 17298 20367 25947 26134 29791 33294 39201 40734 49941 51894 59582 61101 70153 78402 89373 99882 117603 122202 140306 149823 172019 178746 210459 235206 268119 299646 344038 352809 405077 420918 516057 536238 631377 705618 804357 810154 1032114 1215231 1262754 1548171 1608714 1894131 2174743 2430462 3096342 3645693 3788262 4349486 4644513 5332589 6524229 7291386 9289026 10665178 10937079 12557387 13048458 15997767 19572687 21874158 25114774 31995534 37672161 39145374 47993301 58718061 75344322 95986602 113016483 117436122 143979903 226032966 287959806 339049449 389278997 678098898 778557994 1167836991 2335673982 3503510973 7007021946 10510532919 21021065838
• Sum of all divisors σ(n): 49205145600
• Sum of proper divisors (its aliquot sum) s(n): 28184079762
• 21021065838 is an abundant number, because the sum of its proper divisors (28184079762) is greater than itself. Its abundance is 7163013924

Bases of 21021065838

• Binary: 10011100100111101000000001001101110₂
• Hexadecimal: 0x4E4F4026E
• Base-36: 9NNEE7I

Squares and roots of 21021065838

• 21021065838 squared (21021065838²) is 441885208965530642244
• 21021065838 cubed (21021065838³) is 9288898070502807503217548060472
• The square root of 21021065838 is 144986.4332894633
• The cube root of 21021065838 is 2759.8463926801

Scales and comparisons

• 21,021,065,838 seconds is equal to 668 years, 21 weeks, 8 hours, 57 minutes, 18 seconds.
• To count from 1 to 21,021,065,838 would take you about one thousand, three hundred thirty-six 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 21021065838 cubic inches would be around 230 feet tall.

Recreational maths with 21021065838

• 21021065838 backwards is 83856012012
• The number of decimal digits it has is: 11
• The sum of 21021065838's digits is 36
• More coming soon!