21428744805

Names of 21428744805

• Cardinal: 21428744805 can be written as Twenty-one billion, four hundred twenty-eight million, seven hundred forty-four thousand, eight hundred five.

Scientific notation

• Scientific notation: 2.1428744805 × 10¹⁰

Factors of 21428744805

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1049

Divisors of 21428744805

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 9 13 15 27 37 39 45 65 81 111 117 135 185 195 243 333 351 405 481 555 585 991 999 1053 1215 1369 1443 1665 1755 2405 2973 2997 3159 4107 4329 4955 4995 5265 6845 7215 8919 8991 12321 12883 12987 14865 14985 15795 17797 20535 21645 26757 36667 36963 38649 38961 44595 44955 53391 61605 64415 64935 80271 88985 110001 110889 115947 116883 133785 160173 183335 184815 193245 194805 240813 266955 330003 332667 347841 401355 476671 480519 550005 554445 579735 584415 800865 990009 1043523 1204065 1356679 1430013 1441557 1650015 1663335 1739205 2383355 2402595 2970027 3130569 4070037 4290039 4324671 4950045 5217615 6783395 7150065 7207785 8910081 12210111 12870117 14850135 15652845 17636827 20350185 21450195 21623355 36630333 38610351 44550405 52910481 61050555 64350585 88184135 109890999 115831053 158731443 183151665 193051755 264552405 329672997 476194329 549454995 579155265 793657215 1428582987 1648364985 2380971645 4285748961 7142914935 21428744805
• Sum of all divisors σ(n): 42676268544
• Sum of proper divisors (its aliquot sum) s(n): 21247523739
• 21428744805 is a deficient number, because the sum of its proper divisors (21247523739) is less than itself. Its deficiency is 181221066

Bases of 21428744805

• Binary: 10011111101010000001011001001100101₂
• Hexadecimal: 0x4FD40B265
• Base-36: 9UE4DB9

Squares and roots of 21428744805

• 21428744805 squared (21428744805²) is 459191103917814488025
• 21428744805 cubed (21428744805³) is 9839888982581082357219453460125
• The square root of 21428744805 is 146385.6031343245
• The cube root of 21428744805 is 2777.5736124225

Scales and comparisons

• 21,428,744,805 seconds is equal to 681 years, 19 weeks, 21 hours, 6 minutes, 45 seconds.
• To count from 1 to 21,428,744,805 would take you about one thousand, three hundred sixty-two 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 21428744805 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428744805

• 21428744805 backwards is 50844782412
• 21428744805 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21428744805's digits is 45
• More coming soon!