18979874991

Names of 18979874991

• Cardinal: 18979874991 can be written as Eighteen billion, nine hundred seventy-nine million, eight hundred seventy-four thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 1.8979874991 × 10¹⁰

Factors of 18979874991

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 40

Divisors of 18979874991

• Number of divisors d(n): 160
• Complete list of divisors:
  1 3 7 9 11 19 21 27 33 57 63 77 99 121 133 171 189 209 231 297 361 363 399 513 627 693 847 1083 1089 1197 1331 1463 1881 2079 2299 2527 2541 3249 3267 3591 3971 3993 4389 5643 6859 6897 7581 7623 9317 9747 11913 11979 13167 14641 16093 20577 20691 22743 22869 25289 27797 27951 35739 35937 39501 43681 43923 48013 48279 61731 62073 68229 75449 75867 83391 83853 102487 107217 131043 131769 144039 144837 177023 185193 226347 227601 250173 251559 278179 305767 307461 393129 395307 432117 434511 480491 528143 531069 679041 682803 750519 829939 834537 917301 922383 1179387 1296351 1441473 1584429 1593207 1947253 2037123 2489817 2503611 2751903 2767149 3363437 4324419 4753287 4779621 5285401 5809573 5841759 7469451 7510833 8255709 9129329 10090311 12973257 14259861 15856203 17428719 17525277 22408353 27387987 30270933 36997807 47568609 52286157 52575831 63905303 82163961 90812799 100422619 110993421 142705827 156858471 191715909 246491883 301267857 332980263 575147727 702958333 903803571 998940789 1725443181 2108874999 2711410713 6326624997 18979874991
• Sum of all divisors σ(n): 37312064000
• Sum of proper divisors (its aliquot sum) s(n): 18332189009
• 18979874991 is a deficient number, because the sum of its proper divisors (18332189009) is less than itself. Its deficiency is 647685982

Bases of 18979874991

• Binary: 10001101011010010011110100010101111₂
• Hexadecimal: 0x46B49E8AF
• Base-36: 8PW4L9R

Squares and roots of 18979874991

• 18979874991 squared (18979874991²) is 360235654673987250081
• 18979874991 cubed (18979874991³) is 6837227693013322866065234624271
• The square root of 18979874991 is 137767.4670994571
• The cube root of 18979874991 is 2667.4591824271

Scales and comparisons

• 18,979,874,991 seconds is equal to 603 years, 26 weeks, 11 hours, 29 minutes, 51 seconds.
• To count from 1 to 18,979,874,991 would take you about one thousand, two hundred seven 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 18979874991 cubic inches would be around 222.3 feet tall.

Recreational maths with 18979874991

• 18979874991 backwards is 19947897981
• The number of decimal digits it has is: 11
• The sum of 18979874991's digits is 72
• More coming soon!