21981046140

Names of 21981046140

• Cardinal: 21981046140 can be written as Twenty-one billion, nine hundred eighty-one million, forty-six thousand, one hundred forty.

Scientific notation

• Scientific notation: 2.198104614 × 10¹⁰

Factors of 21981046140

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4522859

Divisors of 21981046140

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 81 90 108 135 162 180 243 270 324 405 486 540 810 972 1215 1620 2430 4860 4522849 9045698 13568547 18091396 22614245 27137094 40705641 45228490 54274188 67842735 81411282 90456980 122116923 135685470 162822564 203528205 244233846 271370940 366350769 407056410 488467692 610584615 732701538 814112820 1099052307 1221169230 1465403076 1831753845 2198104614 2442338460 3663507690 4396209228 5495261535 7327015380 10990523070 21981046140
• Sum of all divisors σ(n): 69145330800
• Sum of proper divisors (its aliquot sum) s(n): 47164284660
• 21981046140 is an abundant number, because the sum of its proper divisors (47164284660) is greater than itself. Its abundance is 25183238520

Bases of 21981046140

• Binary: 10100011110001011000010010101111100₂
• Hexadecimal: 0x51E2C257C
• Base-36: A3IY3R0

Squares and roots of 21981046140

• 21981046140 squared (21981046140²) is 483166389408808899600
• 21981046140 cubed (21981046140³) is 10620502698892235744550227544000
• The square root of 21981046140 is 148260.0625252803
• The cube root of 21981046140 is 2801.2344106485

Scales and comparisons

• 21,981,046,140 seconds is equal to 698 years, 48 weeks, 2 days, 6 hours, 9 minutes.
• To count from 1 to 21,981,046,140 would take you about one thousand, three hundred ninety-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 21981046140 cubic inches would be around 233.4 feet tall.

Recreational maths with 21981046140

• 21981046140 backwards is 04164018912
• 21981046140 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21981046140's digits is 36
• More coming soon!