21425820164

Names of 21425820164

• Cardinal: 21425820164 can be written as Twenty-one billion, four hundred twenty-five million, eight hundred twenty thousand, one hundred sixty-four.

Scientific notation

• Scientific notation: 2.1425820164 × 10¹⁰

Factors of 21425820164

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1345

Divisors of 21425820164

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 7 14 28 49 98 113 196 226 343 452 686 791 1223 1372 1582 2446 3164 4892 5537 8561 11074 12769 17122 22148 25538 34244 38759 51076 59927 77518 89383 119854 138199 155036 178766 239708 276398 357532 419489 552796 625681 838978 967393 1251362 1677956 1934786 2502724 3869572 4379767 6771751 8759534 13543502 15616487 17519068 27087004 31232974 47402257 62465948 94804514 109315409 189609028 218630818 437261636 765207863 1530415726 3060831452 5356455041 10712910082 21425820164
• Sum of all divisors σ(n): 44152617600
• Sum of proper divisors (its aliquot sum) s(n): 22726797436
• 21425820164 is an abundant number, because the sum of its proper divisors (22726797436) is greater than itself. Its abundance is 1300977272

Bases of 21425820164

• Binary: 10011111101000101000001001000000100₂
• Hexadecimal: 0x4FD141204
• Base-36: 9UCDON8

Squares and roots of 21425820164

• 21425820164 squared (21425820164²) is 459065769700068986896
• 21425820164 cubed (21425820164³) is 9835860625041918331627368570944
• The square root of 21425820164 is 146375.6132830875
• The cube root of 21425820164 is 2777.4472436071

Scales and comparisons

• 21,425,820,164 seconds is equal to 681 years, 14 weeks, 2 days, 42 minutes, 44 seconds.
• To count from 1 to 21,425,820,164 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 21425820164 cubic inches would be around 231.5 feet tall.

Recreational maths with 21425820164

• 21425820164 backwards is 46102852412
• The number of decimal digits it has is: 11
• The sum of 21425820164's digits is 35
• More coming soon!