21358307817

Names of 21358307817

• Cardinal: 21358307817 can be written as Twenty-one billion, three hundred fifty-eight million, three hundred seven thousand, eight hundred seventeen.

Scientific notation

• Scientific notation: 2.1358307817 × 10¹⁰

Factors of 21358307817

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 114

Divisors of 21358307817

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 11 21 23 29 33 41 49 63 69 77 87 99 123 147 161 203 207 231 253 261 287 319 343 369 441 451 483 529 539 609 667 693 759 861 943 957 1029 1127 1189 1353 1421 1449 1587 1617 1771 1827 2001 2009 2233 2277 2583 2829 2871 3087 3157 3381 3567 3703 3773 4059 4263 4669 4761 4851 5313 5819 6003 6027 6601 6699 7337 7889 8323 8487 9471 9947 10143 10373 10701 11109 11319 12397 12789 13079 14007 14063 15341 15631 15939 17457 18081 19803 20097 21689 22011 22099 23667 24969 25921 27347 28413 29841 31119 32683 33327 33957 37191 39237 40733 42021 42189 46023 46207 46893 51359 52371 58261 59409 65067 66033 66297 71001 72611 74907 77763 82041 86779 89523 91553 93357 98049 107387 109417 111573 117711 122199 126567 138069 138621 140679 151823 154077 154693 168751 174783 181447 191429 195201 198891 217833 228781 233289 238579 246123 260337 274659 285131 294147 300817 322161 323449 328251 359513 366597 407827 415863 455469 462231 464079 506253 508277 524349 544341 574287 628981 640871 653499 686343 715737 751709 781011 823977 855393 902451 966483 970347 984753 1062761 1078539 1181257 1223481 1340003 1366407 1392237 1518759 1524831 1633023 1670053 1722861 1886943 1922613 1995917 2059029 2105719 2147211 2255127 2516591 2566179 2707353 2911041 3188283 3235617 3543771 3557939 3670443 4020009 4402867 4486097 4574493 5010159 5261963 5660829 5767839 5987751 6317157 6765381 6918791 7439327 7549773 8268799 9380021 9564849 10631313 10673817 11690371 12060027 13208601 13458291 14740033 15030477 15785889 17963253 18951471 20756373 22317981 22649319 24806397 28140063 30820069 32021451 35071113 39625803 40374873 44220099 47357667 48431537 57881593 62269119 66953943 74419191 81832597 84420189 92460207 103180231 105213339 132660297 145294611 173644779 215740483 245497791 277380621 309540693 339020759 435883833 520934337 647221449 736493373 928622079 1017062277 1941664347 2373145313 3051186831 7119435939 21358307817
• Sum of all divisors σ(n): 43479072000
• Sum of proper divisors (its aliquot sum) s(n): 22120764183
• 21358307817 is an abundant number, because the sum of its proper divisors (22120764183) is greater than itself. Its abundance is 762456366

Bases of 21358307817

• Binary: 10011111001000011011110100111101001₂
• Hexadecimal: 0x4F90DE9E9
• Base-36: 9T86NS9

Squares and roots of 21358307817

• 21358307817 squared (21358307817²) is 456177312805723305489
• 21358307817 cubed (21358307817³) is 9743175466036534277964787707513
• The square root of 21358307817 is 146144.8179615001
• The cube root of 21358307817 is 2774.5269465851

Scales and comparisons

• 21,358,307,817 seconds is equal to 679 years, 6 weeks, 4 days, 15 hours, 16 minutes, 57 seconds.
• To count from 1 to 21,358,307,817 would take you about one thousand, three hundred fifty-eight 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 21358307817 cubic inches would be around 231.2 feet tall.

Recreational maths with 21358307817

• 21358307817 backwards is 71870385312
• The number of decimal digits it has is: 11
• The sum of 21358307817's digits is 45
• More coming soon!