21655368009

Names of 21655368009

• Cardinal: 21655368009 can be written as Twenty-one billion, six hundred fifty-five million, three hundred sixty-eight thousand and nine.

Scientific notation

• Scientific notation: 2.1655368009 × 10¹⁰

Factors of 21655368009

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 159

Divisors of 21655368009

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 9 11 17 19 27 33 51 57 99 109 153 171 187 209 297 323 327 361 459 513 561 627 969 981 1083 1199 1683 1853 1881 2071 2907 2943 3249 3553 3597 3971 5049 5559 5643 6137 6213 8721 9747 10659 10791 11881 11913 16677 18411 18639 20383 22781 31977 32373 35207 35643 35739 39349 50031 55233 55917 61149 67507 68343 95931 105621 106929 107217 118047 130691 165699 183447 201977 202521 205029 225739 316863 320787 354141 387277 392073 432839 550341 605931 607563 615087 668933 677217 950589 1062423 1161831 1176219 1298517 1817793 1822689 2006799 2031651 2221747 2483129 3485493 3528657 3837563 3895551 4289041 5453379 6020397 6094953 6665241 7358263 7449387 10456479 11512689 11686653 12867123 18061191 19995723 22074789 22348161 34538067 38601369 42213193 47179451 59987169 66224367 67044483 72913697 103614201 115804107 126639579 141538353 198673101 218741091 379918737 424615059 656223273 802050667 1139756211 1273845177 1968669819 2406152001 7218456003 21655368009
• Sum of all divisors σ(n): 39472453440
• Sum of proper divisors (its aliquot sum) s(n): 17817085431
• 21655368009 is a deficient number, because the sum of its proper divisors (17817085431) is less than itself. Its deficiency is 3838282578

Bases of 21655368009

• Binary: 10100001010110000101011000101001001₂
• Hexadecimal: 0x50AC2B149
• Base-36: 9Y51OW9

Squares and roots of 21655368009

• 21655368009 squared (21655368009²) is 468954963605220624081
• 21655368009 cubed (21655368009³) is 10155392316518254008110702424729
• The square root of 21655368009 is 147157.6298021955
• The cube root of 21655368009 is 2787.3308580941

Scales and comparisons

• 21,655,368,009 seconds is equal to 688 years, 29 weeks, 5 days, 20 hours, 9 seconds.
• To count from 1 to 21,655,368,009 would take you about one thousand, three hundred seventy-seven 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 21655368009 cubic inches would be around 232.3 feet tall.

Recreational maths with 21655368009

• 21655368009 backwards is 90086355612
• The number of decimal digits it has is: 11
• The sum of 21655368009's digits is 45
• More coming soon!