21243612090561

Names of 21243612090561

• Cardinal: 21243612090561 can be written as Twenty-one trillion, two hundred forty-three billion, six hundred twelve million, ninety thousand, five hundred sixty-one.

Scientific notation

• Scientific notation: 2.1243612090561 × 10¹³

Factors of 21243612090561

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 238

Divisors of 21243612090561

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 21 49 79 147 149 237 343 447 553 1029 1043 1659 3129 3871 6241 7301 11613 11771 18723 21903 22201 27097 35313 43687 51107 66603 81291 82397 131061 153321 155407 247191 305809 466221 576779 917427 929909 1087849 1730337 1753879 2140663 2789727 3263547 3307949 4037453 5261637 6421989 6509363 7614943 9923847 12112359 12277153 19528089 22844829 23155643 36831459 45565541 69466929 85940071 136696623 138556441 162089501 257820213 261327971 318958787 415669323 486268503 601580497 783983913 956876361 969895087 1134626507 1804741491 1829295797 2909685261 3403879521 5487887391 6789265609 12805070579 20367796827 20644909709 38415211737 47524859263 61934729127 89635494053 142574577789 144514367963 268906482159 433543103889 1011600575741 3034801727223 7081204030187 21243612090561
• Sum of all divisors σ(n): 33681322080000
• Sum of proper divisors (its aliquot sum) s(n): 12437709989439
• 21243612090561 is a deficient number, because the sum of its proper divisors (12437709989439) is less than itself. Its deficiency is 8805902101122

Bases of 21243612090561

• Binary: 100110101001000101001111100111101000011000001₂
• Hexadecimal: 0x135229F3D0C1
• Base-36: 7J36I57SX

Squares and roots of 21243612090561

• 21243612090561 squared (21243612090561²) is 451291054654229500865294721
• 21243612090561 cubed (21243612090561³) is 9587052105014614875877663146434207228481
• The square root of 21243612090561 is 4609079.3105088787
• The cube root of 21243612090561 is 27695.5155675599

Scales and comparisons

• 21,243,612,090,561 seconds is equal to 675,481 years, 7 weeks, 6 days, 22 hours, 29 minutes, 21 seconds.
• To count from 1 to 21,243,612,090,561 would take you about one million, six hundred eighty-eight thousand, seven hundred two 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 21243612090561 cubic inches would be around 2308 feet tall.

Recreational maths with 21243612090561

• 21243612090561 backwards is 16509021634212
• The number of decimal digits it has is: 14
• The sum of 21243612090561's digits is 42
• More coming soon!