21730521813

Names of 21730521813

• Cardinal: 21730521813 can be written as Twenty-one billion, seven hundred thirty million, five hundred twenty-one thousand, eight hundred thirteen.

Scientific notation

• Scientific notation: 2.1730521813 × 10¹⁰

Factors of 21730521813

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 124

Divisors of 21730521813

• Number of divisors d(n): 240
• Complete list of divisors:
  1 3 7 11 13 17 21 33 39 49 51 73 77 91 119 143 147 187 219 221 231 273 289 343 357 429 511 539 561 637 663 803 833 867 949 1001 1029 1241 1309 1533 1547 1617 1911 2023 2401 2409 2431 2499 2847 3003 3179 3577 3723 3757 3773 3927 4459 4641 5621 5831 6069 6643 7007 7203 7293 8687 9163 9537 10439 10731 10829 11271 11319 13377 13651 14161 16133 16863 17017 17493 19929 21021 21097 22253 25039 26061 26299 26411 27489 31213 31317 32487 39347 40817 40953 41327 42483 46501 48399 49049 51051 60809 63291 64141 66759 73073 75117 75803 78897 79233 93639 95557 99127 112931 118041 119119 122451 123981 139503 147147 147679 155771 175273 177463 182427 184093 192423 219219 227409 232067 274261 275429 286671 289289 297381 325507 338793 343343 357357 425663 443037 448987 467313 511511 525819 530621 532389 552279 668899 693889 696201 790517 822783 826287 833833 867867 976521 1030029 1033753 1090397 1242241 1276989 1288651 1346961 1534533 1591863 1624469 1919827 1928003 2006697 2025023 2081667 2278549 2371551 2501499 2979641 3016871 3101259 3271191 3580577 3726723 3865953 4682293 4873407 5533619 5759481 5784009 5836831 6075069 6835647 7236271 7632779 8695687 8938923 9020557 9050613 10741731 11371283 13438789 14046879 14175161 16600857 17510493 21118097 21708813 22898337 25064039 26087061 27061671 32776051 34113849 38735333 40316367 42525483 50653897 60869809 63354291 75192117 79598981 94071523 98328153 99226127 116205999 147826679 151961691 182609427 238796943 282214569 297678381 426088663 443480037 557192867 658500661 1034786753 1278265989 1671578601 1975501983 3104360259 7243507271 21730521813
• Sum of all divisors σ(n): 42761455296
• Sum of proper divisors (its aliquot sum) s(n): 21030933483
• 21730521813 is a deficient number, because the sum of its proper divisors (21030933483) is less than itself. Its deficiency is 699588330

Bases of 21730521813

• Binary: 10100001111001111010111001011010101₂
• Hexadecimal: 0x50F3D72D5
• Base-36: 9ZDSHXX

Squares and roots of 21730521813

• 21730521813 squared (21730521813²) is 472215578265268806969
• 21730521813 cubed (21730521813³) is 10261490923931832510148340914797
• The square root of 21730521813 is 147412.7600074023
• The cube root of 21730521813 is 2790.5515630793

Scales and comparisons

• 21,730,521,813 seconds is equal to 690 years, 50 weeks, 16 hours, 3 minutes, 33 seconds.
• To count from 1 to 21,730,521,813 would take you about one thousand, three hundred eighty-one 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 21730521813 cubic inches would be around 232.5 feet tall.

Recreational maths with 21730521813

• 21730521813 backwards is 31812503712
• 21730521813 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21730521813's digits is 33
• More coming soon!