20818218840

Names of 20818218840

• Cardinal: 20818218840 can be written as Twenty billion, eight hundred eighteen million, two hundred eighteen thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.081821884 × 10¹⁰

Factors of 20818218840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 15377

Divisors of 20818218840

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 73 120 146 157 219 292 314 365 438 471 584 628 730 785 876 942 1095 1256 1460 1570 1752 1884 2190 2355 2920 3140 3768 4380 4710 6280 8760 9420 11461 15137 18840 22922 30274 34383 45411 45844 57305 60548 68766 75685 90822 91688 114610 121096 137532 151370 171915 181644 227055 229220 275064 302740 343830 363288 454110 458440 605480 687660 908220 1105001 1375320 1816440 2210002 2376509 3315003 4420004 4753018 5525005 6630006 7129527 8840008 9506036 11050010 11882545 13260012 14259054 16575015 19012072 22100020 23765090 26520024 28518108 33150030 35647635 44200040 47530180 57036216 66300060 71295270 95060360 132600120 142590540 173485157 285181080 346970314 520455471 693940628 867425785 1040910942 1387881256 1734851570 2081821884 2602277355 3469703140 4163643768 5204554710 6939406280 10409109420 20818218840
• Sum of all divisors σ(n): 63717658560
• Sum of proper divisors (its aliquot sum) s(n): 42899439720
• 20818218840 is an abundant number, because the sum of its proper divisors (42899439720) is greater than itself. Its abundance is 22081220880

Bases of 20818218840

• Binary: 10011011000110111001100111101011000₂
• Hexadecimal: 0x4D8DCCF58
• Base-36: 9KAMOGO

Squares and roots of 20818218840

• 20818218840 squared (20818218840²) is 433398235670130945600
• 20818218840 cubed (20818218840³) is 9022579315050680076956935104000
• The square root of 20818218840 is 144285.1996567909
• The cube root of 20818218840 is 2750.9404536609

Scales and comparisons

• 20,818,218,840 seconds is equal to 661 years, 49 weeks, 4 days, 14 hours, 34 minutes.
• To count from 1 to 20,818,218,840 would take you about one thousand, three hundred twenty-three 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 20818218840 cubic inches would be around 229.2 feet tall.

Recreational maths with 20818218840

• 20818218840 backwards is 04881281802
• The number of decimal digits it has is: 11
• The sum of 20818218840's digits is 42
• More coming soon!