21131855424

Names of 21131855424

• Cardinal: 21131855424 can be written as Twenty-one billion, one hundred thirty-one million, eight hundred fifty-five thousand, four hundred twenty-four.

Scientific notation

• Scientific notation: 2.1131855424 × 10¹⁰

Factors of 21131855424

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 678

Divisors of 21131855424

• Number of divisors d(n): 147
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 81 96 108 144 162 192 216 243 288 324 432 486 576 648 673 729 864 972 1296 1346 1458 1728 1944 2019 2592 2692 2916 3888 4038 5184 5384 5832 6057 7776 8076 10768 11664 12114 15552 16152 18171 21536 23328 24228 32304 36342 43072 46656 48456 54513 64608 72684 96912 109026 129216 145368 163539 193824 218052 290736 327078 387648 436104 452929 490617 581472 654156 872208 905858 981234 1162944 1308312 1358787 1744416 1811716 1962468 2616624 2717574 3488832 3623432 3924936 4076361 5233248 5435148 7246864 7849872 8152722 10466496 10870296 12229083 14493728 15699744 16305444 21740592 24458166 28987456 31399488 32610888 36687249 43481184 48916332 65221776 73374498 86962368 97832664 110061747 130443552 146748996 195665328 220123494 260887104 293497992 330185241 391330656 440246988 586995984 660370482 782661312 880493976 1173991968 1320740964 1760987952 2347983936 2641481928 3521975904 5282963856 7043951808 10565927712 21131855424
• Sum of all divisors σ(n): 62965086033
• Sum of proper divisors (its aliquot sum) s(n): 41833230609
• 21131855424 is an abundant number, because the sum of its proper divisors (41833230609) is greater than itself. Its abundance is 20701375185

Bases of 21131855424

• Binary: 10011101011100011101000011001000000₂
• Hexadecimal: 0x4EB8E8640
• Base-36: 9PHD000

Squares and roots of 21131855424

• 21131855424 squared (21131855424²) is 446555313660838219776
• 21131855424 cubed (21131855424³) is 9436542327099805430959969665024
• 21131855424 is a perfect square number. Its square root is 145368
• The cube root of 21131855424 is 2764.6864048381

Scales and comparisons

• 21,131,855,424 seconds is equal to 671 years, 48 weeks, 1 day, 15 hours, 50 minutes, 24 seconds.
• To count from 1 to 21,131,855,424 would take you about one thousand, three hundred forty-three 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 21131855424 cubic inches would be around 230.4 feet tall.

Recreational maths with 21131855424

• 21131855424 backwards is 42455813112
• 21131855424 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21131855424's digits is 36
• More coming soon!