21380616621

Names of 21380616621

• Cardinal: 21380616621 can be written as Twenty-one billion, three hundred eighty million, six hundred sixteen thousand, six hundred twenty-one.

Scientific notation

• Scientific notation: 2.1380616621 × 10¹⁰

Factors of 21380616621

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 6120

Divisors of 21380616621

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 21 23 39 63 69 91 117 161 193 207 273 299 483 579 819 897 1351 1449 1737 2093 2509 2691 4053 4439 5881 6279 7527 12159 13317 17563 17643 18837 22581 31073 39951 41167 52689 52929 57707 76453 93219 123501 135263 158067 173121 229359 279657 370503 403949 405789 519363 535171 688077 946841 1135033 1211847 1217367 1605513 1758419 2840523 3405099 3635541 4816539 5275257 7945231 8521569 10215297 12308933 14755429 15825771 23835693 26105759 36926799 44266287 71507079 78317277 103288003 110780397 132798861 182740313 234951831 309864009 339374867 548220939 929592027 1018124601 1644662817 2375624069 3054373803 7126872207 21380616621
• Sum of all divisors σ(n): 39874877952
• Sum of proper divisors (its aliquot sum) s(n): 18494261331
• 21380616621 is a deficient number, because the sum of its proper divisors (18494261331) is less than itself. Its deficiency is 2886355290

Bases of 21380616621

• Binary: 10011111010011000100101000110101101₂
• Hexadecimal: 0x4FA6251AD
• Base-36: 9TLGTD9

Squares and roots of 21380616621

• 21380616621 squared (21380616621²) is 457130767094181457641
• 21380616621 cubed (21380616621³) is 9773737676904335945629172051061
• The square root of 21380616621 is 146221.1223489959
• The cube root of 21380616621 is 2775.4926104783

Scales and comparisons

• 21,380,616,621 seconds is equal to 679 years, 43 weeks, 3 days, 20 hours, 10 minutes, 21 seconds.
• To count from 1 to 21,380,616,621 would take you about one thousand, three hundred fifty-nine 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 21380616621 cubic inches would be around 231.3 feet tall.

Recreational maths with 21380616621

• 21380616621 backwards is 12661608312
• The number of decimal digits it has is: 11
• The sum of 21380616621's digits is 36
• More coming soon!