21005986240

Names of 21005986240

• Cardinal: 21005986240 can be written as Twenty-one billion, five million, nine hundred eighty-six thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.100598624 × 10¹⁰

Factors of 21005986240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 6560

Divisors of 21005986240

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 79 80 131 158 160 262 316 320 395 524 632 655 790 1048 1264 1310 1580 2096 2528 2620 3160 4192 5056 5240 6320 6343 8384 10349 10480 12640 12686 20698 20960 25280 25372 31715 41396 41920 50744 51745 63430 82792 101488 103490 126860 165584 202976 206980 253720 331168 405952 413960 501097 507440 662336 827920 830933 1002194 1014880 1655840 1661866 2004388 2029760 2505485 3311680 3323732 4008776 4154665 5010970 6647464 8017552 8309330 10021940 13294928 16035104 16618660 20043880 26589856 32070208 33237320 40087760 53179712 65643707 66474640 80175520 131287414 132949280 160351040 262574828 265898560 328218535 525149656 656437070 1050299312 1312874140 2100598624 2625748280 4201197248 5251496560 10502993120 21005986240
• Sum of all divisors σ(n): 51048391680
• Sum of proper divisors (its aliquot sum) s(n): 30042405440
• 21005986240 is an abundant number, because the sum of its proper divisors (30042405440) is greater than itself. Its abundance is 9036419200

Bases of 21005986240

• Binary: 10011100100000011011110100111000000₂
• Hexadecimal: 0x4E40DE9C0
• Base-36: 9NEF6PS

Squares and roots of 21005986240

• 21005986240 squared (21005986240²) is 441251457915069337600
• 21005986240 cubed (21005986240³) is 9268922053343885594271514624000
• The square root of 21005986240 is 144934.4204804365
• The cube root of 21005986240 is 2759.1863035749

Scales and comparisons

• 21,005,986,240 seconds is equal to 667 years, 48 weeks, 20 hours, 10 minutes, 40 seconds.
• To count from 1 to 21,005,986,240 would take you about one thousand, three hundred thirty-five 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 21005986240 cubic inches would be around 229.9 feet tall.

Recreational maths with 21005986240

• 21005986240 backwards is 04268950012
• The number of decimal digits it has is: 11
• The sum of 21005986240's digits is 37
• More coming soon!