18172121940

Names of 18172121940

• Cardinal: 18172121940 can be written as Eighteen billion, one hundred seventy-two million, one hundred twenty-one thousand, nine hundred forty.

Scientific notation

• Scientific notation: 1.817212194 × 10¹⁰

Factors of 18172121940

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 182657

Divisors of 18172121940

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 79 84 90 105 126 140 158 180 210 237 252 315 316 395 420 474 553 630 711 790 948 1106 1185 1260 1422 1580 1659 2212 2370 2765 2844 3318 3555 4740 4977 5530 6636 7110 8295 9954 11060 14220 16590 19908 24885 33180 49770 99540 182561 365122 547683 730244 912805 1095366 1277927 1643049 1825610 2190732 2555854 2738415 3286098 3651220 3833781 5111708 5476830 6389635 6572196 7667562 8215245 10953660 11501343 12779270 14422319 15335124 16430490 19168905 23002686 25558540 28844638 32860980 38337810 43266957 46005372 57506715 57689276 72111595 76675620 86533914 100956233 115013430 129800871 144223190 173067828 201912466 216334785 230026860 259601742 288446380 302868699 403824932 432669570 504781165 519203484 605737398 649004355 865339140 908606097 1009562330 1211474796 1298008710 1514343495 1817212194 2019124660 2596017420 3028686990 3634424388 4543030485 6057373980 9086060970 18172121940
• Sum of all divisors σ(n): 63794465280
• Sum of proper divisors (its aliquot sum) s(n): 45622343340
• 18172121940 is an abundant number, because the sum of its proper divisors (45622343340) is greater than itself. Its abundance is 27450221400

Bases of 18172121940

• Binary: 10000111011001001001001001101010100₂
• Hexadecimal: 0x43B249354
• Base-36: 8CJ7N10

Squares and roots of 18172121940

• 18172121940 squared (18172121940²) is 330226015802229363600
• 18172121940 cubed (18172121940³) is 6000907426918478919187797384000
• The square root of 18172121940 is 134804.0130708281
• The cube root of 18172121940 is 2629.0683732527

Scales and comparisons

• 18,172,121,940 seconds is equal to 577 years, 42 weeks, 3 days, 11 hours, 39 minutes.
• To count from 1 to 18,172,121,940 would take you about one thousand, one hundred fifty-five 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 18172121940 cubic inches would be around 219.1 feet tall.

Recreational maths with 18172121940

• 18172121940 backwards is 04912127181
• 18172121940 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18172121940's digits is 36
• More coming soon!