21390845184

Names of 21390845184

• Cardinal: 21390845184 can be written as Twenty-one billion, three hundred ninety million, eight hundred forty-five thousand, one hundred eighty-four.

Scientific notation

• Scientific notation: 2.1390845184 × 10¹⁰

Factors of 21390845184

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 9697

Divisors of 21390845184

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 31 32 36 48 62 64 72 93 96 124 128 144 186 192 248 256 279 288 372 384 496 558 576 744 768 961 992 1116 1152 1488 1922 1984 2232 2304 2883 2976 3844 3968 4464 5766 5952 7688 7936 8649 8928 9661 11532 11904 15376 17298 17856 19322 23064 23808 28983 30752 34596 35712 38644 46128 57966 61504 69192 71424 77288 86949 92256 115932 123008 138384 154576 173898 184512 231864 246016 276768 299491 309152 347796 369024 463728 553536 598982 618304 695592 738048 898473 927456 1107072 1197964 1236608 1391184 1796946 1854912 2214144 2395928 2473216 2695419 2782368 3593892 3709824 4791856 5390838 5564736 7187784 7419648 9284221 9583712 10781676 11129472 14375568 18568442 19167424 21563352 22258944 27852663 28751136 37136884 38334848 43126704 55705326 57502272 74273768 76669696 83557989 86253408 111410652 115004544 148547536 167115978 172506816 222821304 230009088 297095072 334231956 345013632 445642608 594190144 668463912 690027264 891285216 1188380288 1336927824 1782570432 2376760576 2673855648 3565140864 5347711296 7130281728 10695422592 21390845184
• Sum of all divisors σ(n): 63735373338
• Sum of proper divisors (its aliquot sum) s(n): 42344528154
• 21390845184 is an abundant number, because the sum of its proper divisors (42344528154) is greater than itself. Its abundance is 20953682970

Bases of 21390845184

• Binary: 10011111010111111100110010100000000₂
• Hexadecimal: 0x4FAFE6500
• Base-36: 9TRK1S0

Squares and roots of 21390845184

• 21390845184 squared (21390845184²) is 457568257685855993856
• 21390845184 cubed (21390845184³) is 9787771761270763671092151189504
• The square root of 21390845184 is 146256.0945191687
• The cube root of 21390845184 is 2775.9351417603

Scales and comparisons

• 21,390,845,184 seconds is equal to 680 years, 8 weeks, 3 days, 5 hours, 26 minutes, 24 seconds.
• To count from 1 to 21,390,845,184 would take you about one thousand, three hundred sixty 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 21390845184 cubic inches would be around 231.3 feet tall.

Recreational maths with 21390845184

• 21390845184 backwards is 48154809312
• The number of decimal digits it has is: 11
• The sum of 21390845184's digits is 45
• More coming soon!