21081738648

Names of 21081738648

• Cardinal: 21081738648 can be written as Twenty-one billion, eighty-one million, seven hundred thirty-eight thousand, six hundred forty-eight.

Scientific notation

• Scientific notation: 2.1081738648 × 10¹⁰

Factors of 21081738648

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 17922

Divisors of 21081738648

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 8 12 19 24 38 57 76 114 137 152 228 274 361 411 456 548 722 822 1083 1096 1444 1644 2166 2603 2888 3288 4332 5206 7809 8664 10412 15618 17761 20824 31236 35522 49457 53283 62472 71044 98914 106566 142088 148371 197828 213132 296742 337459 395656 426264 593484 674918 1012377 1186968 1349836 2024754 2433257 2699672 4049508 4866514 6411721 7299771 8099016 9733028 12823442 14599542 19235163 19466056 25646884 29199084 38470326 46231883 51293768 58398168 76940652 92463766 138695649 153881304 184927532 277391298 369855064 554782596 878405777 1109565192 1756811554 2635217331 3513623108 5270434662 7027246216 10540869324 21081738648
• Sum of all divisors σ(n): 56033426160
• Sum of proper divisors (its aliquot sum) s(n): 34951687512
• 21081738648 is an abundant number, because the sum of its proper divisors (34951687512) is greater than itself. Its abundance is 13869948864

Bases of 21081738648

• Binary: 10011101000100100011100110110011000₂
• Hexadecimal: 0x4E891CD98
• Base-36: 9ONITNC

Squares and roots of 21081738648

• 21081738648 squared (21081738648²) is 444439704422576867904
• 21081738648 cubed (21081738648³) is 9369561693431135279842547553792
• The square root of 21081738648 is 145195.5186911773
• The cube root of 21081738648 is 2762.4990775997

Scales and comparisons

• 21,081,738,648 seconds is equal to 670 years, 17 weeks, 2 days, 14 hours, 30 minutes, 48 seconds.
• To count from 1 to 21,081,738,648 would take you about one thousand, three hundred forty 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 21081738648 cubic inches would be around 230.2 feet tall.

Recreational maths with 21081738648

• 21081738648 backwards is 84683718012
• The number of decimal digits it has is: 11
• The sum of 21081738648's digits is 48
• More coming soon!