21020021841

Names of 21020021841

• Cardinal: 21020021841 can be written as Twenty-one billion, twenty million, twenty-one thousand, eight hundred forty-one.

Scientific notation

• Scientific notation: 2.1020021841 × 10¹⁰

Factors of 21020021841

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2063

Divisors of 21020021841

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 13 17 19 21 39 51 57 91 119 127 133 221 247 273 323 357 381 399 663 741 889 969 1547 1651 1729 1877 2159 2261 2413 2667 4199 4641 4953 5187 5631 6477 6783 7239 11557 12597 13139 15113 16891 24401 28067 29393 31369 31909 34671 35663 39417 41021 45339 50673 73203 84201 88179 94107 95727 106989 123063 170807 196469 219583 223363 238379 249641 287147 414817 463619 512421 533273 589407 606271 658749 670089 715137 748923 861441 1244451 1390857 1599819 1668653 1818813 2903719 3098927 3245333 3732911 4052443 4243897 4529201 5005959 7881523 8711157 9296781 9735999 11198733 12157329 12731691 13587603 21692489 23644569 28367101 31704407 52681759 55170661 58879613 65077467 76996417 85101303 95113221 158045277 165511983 176638839 230989251 368772313 412157291 538974919 1000953421 1106316939 1236471873 1616924757 3002860263 7006673947 21020021841
• Sum of all divisors σ(n): 38769131520
• Sum of proper divisors (its aliquot sum) s(n): 17749109679
• 21020021841 is a deficient number, because the sum of its proper divisors (17749109679) is less than itself. Its deficiency is 3270912162

Bases of 21020021841

• Binary: 10011100100111001000001010001010001₂
• Hexadecimal: 0x4E4E41451
• Base-36: 9NMS0NL

Squares and roots of 21020021841

• 21020021841 squared (21020021841²) is 441841318196117029281
• 21020021841 cubed (21020021841³) is 9287514158738610676878656526321
• The square root of 21020021841 is 144982.8329182459
• The cube root of 21020021841 is 2759.8007032895

Scales and comparisons

• 21,020,021,841 seconds is equal to 668 years, 19 weeks, 2 days, 6 hours, 57 minutes, 21 seconds.
• To count from 1 to 21,020,021,841 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 21020021841 cubic inches would be around 230 feet tall.

Recreational maths with 21020021841

• 21020021841 backwards is 14812002012
• 21020021841 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21020021841's digits is 21
• More coming soon!