21243847989

Names of 21243847989

• Cardinal: 21243847989 can be written as Twenty-one billion, two hundred forty-three million, eight hundred forty-seven thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 2.1243847989 × 10¹⁰

Factors of 21243847989

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1211

Divisors of 21243847989

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 13 17 21 31 39 51 91 93 119 149 217 221 273 357 403 447 527 651 663 991 1043 1209 1547 1581 1937 2533 2821 2973 3129 3689 4619 4641 5811 6851 6937 7599 8463 11067 12883 13559 13857 16847 17731 20553 20811 30721 32333 32929 38649 40677 47957 50541 53193 60047 78523 90181 92163 96999 98787 117929 143871 147659 180141 215047 219011 230503 235569 270543 353787 399373 420329 442977 522257 549661 645141 657033 691509 1020799 1033613 1198119 1260987 1533077 1566771 1648983 1919567 2510203 2795611 3062397 3100839 3655799 4577429 4599231 5758701 6789341 7145593 7530609 8386833 10967397 13436969 13732287 17571421 20368023 21436779 32042003 32632639 40310907 47525387 52714263 59506577 77816293 96126009 97897917 142576161 178519731 228428473 233448879 416546039 544714051 685285419 1011611809 1249638117 1634142153 3034835427 7081282663 21243847989
• Sum of all divisors σ(n): 38397542400
• Sum of proper divisors (its aliquot sum) s(n): 17153694411
• 21243847989 is a deficient number, because the sum of its proper divisors (17153694411) is less than itself. Its deficiency is 4090153578

Bases of 21243847989

• Binary: 10011110010001110110110010100110101₂
• Hexadecimal: 0x4F23B6535
• Base-36: 9RC1E0L

Squares and roots of 21243847989

• 21243847989 squared (21243847989²) is 451301077379739344121
• 21243847989 cubed (21243847989³) is 9587371485127109054949084822669
• The square root of 21243847989 is 145752.6946200309
• The cube root of 21243847989 is 2769.5618081587

Scales and comparisons

• 21,243,847,989 seconds is equal to 675 years, 25 weeks, 2 days, 20 hours, 53 minutes, 9 seconds.
• To count from 1 to 21,243,847,989 would take you about one thousand, three hundred fifty 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 21243847989 cubic inches would be around 230.8 feet tall.

Recreational maths with 21243847989

• 21243847989 backwards is 98974834212
• The number of decimal digits it has is: 11
• The sum of 21243847989's digits is 57
• More coming soon!