21505442420

Names of 21505442420

• Cardinal: 21505442420 can be written as Twenty-one billion, five hundred five million, four hundred forty-two thousand, four hundred twenty.

Scientific notation

• Scientific notation: 2.150544242 × 10¹⁰

Factors of 21505442420

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 68845

Divisors of 21505442420

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 7 10 11 14 20 22 28 29 35 44 49 55 58 70 77 98 110 116 140 145 154 196 203 220 245 290 308 319 385 406 490 539 580 638 770 812 980 1015 1078 1276 1421 1540 1595 2030 2156 2233 2695 2842 3190 4060 4466 5390 5684 6380 7105 8932 10780 11165 14210 15631 22330 28420 31262 44660 62524 68791 78155 137582 156310 275164 312620 343955 481537 687910 756701 963074 1375820 1513402 1926148 1994939 2407685 3026804 3370759 3783505 3989878 4815370 5296907 6741518 7567010 7979756 9630740 9974695 10593814 13483036 13964573 15134020 16853795 19949390 21187628 21944329 26484535 27929146 33707590 37078349 39898780 43888658 52969070 55858292 67415180 69822865 74156698 87777316 97752011 105938140 109721645 139645730 148313396 153610303 185391745 195504022 219443290 279291460 307220606 370783490 391008044 438886580 488760055 614441212 741566980 768051515 977520110 1075272121 1536103030 1955040220 2150544242 3072206060 4301088484 5376360605 10752721210 21505442420
• Sum of all divisors σ(n): 59287697280
• Sum of proper divisors (its aliquot sum) s(n): 37782254860
• 21505442420 is an abundant number, because the sum of its proper divisors (37782254860) is greater than itself. Its abundance is 16276812440

Bases of 21505442420

• Binary: 10100000001110100110000001001110100₂
• Hexadecimal: 0x501D30274
• Base-36: 9VNS9KK

Squares and roots of 21505442420

• 21505442420 squared (21505442420²) is 462484053679935456400
• 21505442420 cubed (21505442420³) is 9945924186582041066926620488000
• The square root of 21505442420 is 146647.3403100103
• The cube root of 21505442420 is 2780.8834907387

Scales and comparisons

• 21,505,442,420 seconds is equal to 683 years, 41 weeks, 6 days, 14 hours, 20 seconds.
• To count from 1 to 21,505,442,420 would take you about one thousand, three hundred sixty-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 21505442420 cubic inches would be around 231.7 feet tall.

Recreational maths with 21505442420

• 21505442420 backwards is 02424450512
• 21505442420 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21505442420's digits is 29
• More coming soon!