21009428418154020

Names of 21009428418154020

• Cardinal: 21009428418154020 can be written as Twenty-one quadrillion, nine trillion, four hundred twenty-eight billion, four hundred eighteen million, one hundred fifty-four thousand and twenty.

Scientific notation

• Scientific notation: 2.100942841815402 × 10¹⁶

Factors of 21009428418154020

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 26935164638682

Divisors of 21009428418154020

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 130 156 195 260 390 780 26935164638659 53870329277318 80805493915977 107740658554636 134675823193295 161610987831954 269351646386590 323221975663908 350157140302567 404027469579885 538703292773180 700314280605134 808054939159770 1050471420907701 1400628561210268 1616109878319540 1750785701512835 2100942841815402 3501571403025670 4201885683630804 5252357104538505 7003142806051340 10504714209077010 21009428418154020
• Sum of all divisors σ(n): 63351507230128320
• Sum of proper divisors (its aliquot sum) s(n): 42342078811974300
• 21009428418154020 is an abundant number, because the sum of its proper divisors (42342078811974300) is greater than itself. Its abundance is 21332650393820280

Bases of 21009428418154020

• Binary: 1001010101000111111011010111101110011000100111000100100₂
• Hexadecimal: 0x4AA3F6BDCC4E24
• Base-36: 5QV7Y68SVFO

Squares and roots of 21009428418154020

• 21009428418154020 squared (21009428418154020²) is 441396082457537727053904442160400
• 21009428418154020 cubed (21009428418154020³) is 9273479398445248225693537365701987436428744808000
• The square root of 21009428418154020 is 144946294.9445553093
• The cube root of 21009428418154020 is 275933.7008108553

Scales and comparisons

• 21,009,428,418,154,020 seconds is equal to 668,034,837 years, 13 weeks, 6 days, 16 hours, 7 minutes.
• To count from 1 to 21,009,428,418,154,020 would take you about two billion, four million, one hundred four thousand, five hundred eleven 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 21009428418154020 cubic inches would be around 22994.5 feet tall.

Recreational maths with 21009428418154020

• 21009428418154020 backwards is 02045181482490012
• The number of decimal digits it has is: 17
• The sum of 21009428418154020's digits is 51
• More coming soon!