18738791820

Names of 18738791820

• Cardinal: 18738791820 can be written as Eighteen billion, seven hundred thirty-eight million, seven hundred ninety-one thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 1.873879182 × 10¹⁰

Factors of 18738791820

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3397

Divisors of 18738791820

• Number of divisors d(n): 216
• 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 67 70 84 90 105 126 134 140 180 201 210 252 268 315 335 402 420 469 603 630 670 804 938 1005 1206 1260 1340 1407 1876 2010 2345 2412 2814 3015 3313 4020 4221 4489 4690 5628 6030 6626 7035 8442 8978 9380 9939 12060 13252 13467 14070 16565 16884 17956 19878 21105 22445 23191 26934 28140 29817 31423 33130 39756 40401 42210 44890 46382 49695 53868 59634 62846 66260 67335 69573 80802 84420 89780 92764 94269 99390 115955 119268 125692 134670 139146 149085 157115 161604 188538 198780 202005 208719 221971 231910 269340 278292 282807 298170 314230 347865 377076 404010 417438 443942 463820 471345 565614 596340 628460 665913 695730 808020 834876 887884 942690 1043595 1109855 1131228 1331826 1391460 1414035 1553797 1885380 1997739 2087190 2219710 2663652 2828070 3107594 3329565 3995478 4174380 4439420 4661391 5656140 6215188 6659130 7768985 7990956 9322782 9988695 13318260 13984173 14872057 15537970 18645564 19977390 23306955 27968346 29744114 31075940 39954780 44616171 46613910 55936692 59488228 69920865 74360285 89232342 93227820 104104399 133848513 139841730 148720570 178464684 208208798 223080855 267697026 279683460 297441140 312313197 416417596 446161710 520521995 535394052 624626394 669242565 892323420 936939591 1041043990 1249252788 1338485130 1561565985 1873879182 2082087980 2676970260 3123131970 3747758364 4684697955 6246263940 9369395910 18738791820
• Sum of all divisors σ(n): 65965090464
• Sum of proper divisors (its aliquot sum) s(n): 47226298644
• 18738791820 is an abundant number, because the sum of its proper divisors (47226298644) is greater than itself. Its abundance is 28487506824

Bases of 18738791820

• Binary: 10001011100111010110100010110001100₂
• Hexadecimal: 0x45CEB458C
• Base-36: 8LWLCB0

Squares and roots of 18738791820

• 18738791820 squared (18738791820²) is 351142318873298912400
• 18738791820 cubed (18738791820³) is 6579982812558805276096016568000
• The square root of 18738791820 is 136889.7067715467
• The cube root of 18738791820 is 2656.1169632877

Scales and comparisons

• 18,738,791,820 seconds is equal to 595 years, 43 weeks, 3 days, 3 hours, 57 minutes.
• To count from 1 to 18,738,791,820 would take you about one thousand, one hundred ninety-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 18738791820 cubic inches would be around 221.3 feet tall.

Recreational maths with 18738791820

• 18738791820 backwards is 02819783781
• The number of decimal digits it has is: 11
• The sum of 18738791820's digits is 54
• More coming soon!