18419979621

Names of 18419979621

• Cardinal: 18419979621 can be written as Eighteen billion, four hundred nineteen million, nine hundred seventy-nine thousand, six hundred twenty-one.

Scientific notation

• Scientific notation: 1.8419979621 × 10¹⁰

Factors of 18419979621

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1330

Divisors of 18419979621

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 17 31 51 79 93 139 237 417 527 1061 1343 1581 2363 2449 3183 4029 4309 7089 7347 10981 12927 18037 32891 32943 41633 54111 73253 83819 98673 124899 147479 186677 219759 251457 340411 442437 559147 560031 1021233 1424923 1677441 2507143 2598389 4274769 4571849 5786987 7521429 7795167 11650841 13715547 17360961 34952523 44172613 77721433 132517839 198064297 233164299 361176071 594192891 1083528213 6139993207 18419979621
• Sum of all divisors σ(n): 27404697600
• Sum of proper divisors (its aliquot sum) s(n): 8984717979
• 18419979621 is a deficient number, because the sum of its proper divisors (8984717979) is less than itself. Its deficiency is 9435261642

Bases of 18419979621

• Binary: 10001001001111010101001010101100101₂
• Hexadecimal: 0x449EA9565
• Base-36: 8GMS38L

Squares and roots of 18419979621

• 18419979621 squared (18419979621²) is 339295649238055303641
• 18419979621 cubed (18419979621³) is 6249818944458942870738187100061
• The square root of 18419979621 is 135720.2255413687
• The cube root of 18419979621 is 2640.9674494617

Scales and comparisons

• 18,419,979,621 seconds is equal to 585 years, 36 weeks, 2 days, 5 hours, 21 seconds.
• To count from 1 to 18,419,979,621 would take you about one thousand, one hundred seventy-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 18419979621 cubic inches would be around 220.1 feet tall.

Recreational maths with 18419979621

• 18419979621 backwards is 12697991481
• The number of decimal digits it has is: 11
• The sum of 18419979621's digits is 57
• More coming soon!