181981618020

Names of 181981618020

• Cardinal: 181981618020 can be written as One hundred eighty-one billion, nine hundred eighty-one million, six hundred eighteen thousand and twenty.

Scientific notation

• Scientific notation: 1.8198161802 × 10¹¹

Factors of 181981618020

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3498328

Divisors of 181981618020

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 17 18 20 30 34 36 45 51 60 68 85 90 102 153 170 180 204 255 289 306 340 510 578 612 765 867 1020 1156 1445 1530 1734 2601 2890 3060 3468 4335 5202 5780 8670 10404 13005 17340 26010 52020 3498301 6996602 10494903 13993204 17491505 20989806 31484709 34983010 41979612 52474515 59471117 62969418 69966020 104949030 118942234 125938836 157423545 178413351 209898060 237884468 297355585 314847090 356826702 535240053 594711170 629694180 713653404 892066755 1011008989 1070480106 1189422340 1784133510 2022017978 2140960212 2676200265 3033026967 3568267020 4044035956 5055044945 5352400530 6066053934 9099080901 10110089890 10704801060 12132107868 15165134835 18198161802 20220179780 30330269670 36396323604 45495404505 60660539340 90990809010 181981618020
• Sum of all divisors σ(n): 586392377844
• Sum of proper divisors (its aliquot sum) s(n): 404410759824
• 181981618020 is an abundant number, because the sum of its proper divisors (404410759824) is greater than itself. Its abundance is 222429141804

Bases of 181981618020

• Binary: 10101001011110111100110001111101100100₂
• Hexadecimal: 0x2A5EF31F64
• Base-36: 2BLN5N50

Squares and roots of 181981618020

• 181981618020 squared (181981618020²) is 33117309297177188720400
• 181981618020 cubed (181981618020³) is 6026741530369093821973285381608000
• The square root of 181981618020 is 426593.0355971601
• The cube root of 181981618020 is 5666.8603111603

Scales and comparisons

• 181,981,618,020 seconds is equal to 5,786 years, 23 weeks, 3 days, 17 hours, 27 minutes.
• To count from 1 to 181,981,618,020 would take you about eleven thousand, five hundred seventy-two 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 181981618020 cubic inches would be around 472.2 feet tall.

Recreational maths with 181981618020

• 181981618020 backwards is 020816189181
• 181981618020 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 181981618020's digits is 45
• More coming soon!