21338991128

Names of 21338991128

• Cardinal: 21338991128 can be written as Twenty-one billion, three hundred thirty-eight million, nine hundred ninety-one thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1338991128 × 10¹⁰

Factors of 21338991128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 180012

Divisors of 21338991128

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 52 56 91 104 163 182 326 364 652 728 1141 1304 2119 2282 4238 4564 8476 9128 14833 16952 29666 59332 118664 179827 359654 719308 1258789 1438616 2337751 2517578 4675502 5035156 9351004 10070312 16364257 18702008 29311801 32728514 58623602 65457028 117247204 130914056 205182607 234494408 381053413 410365214 762106826 820730428 1524213652 1641460856 2667373891 3048427304 5334747782 10669495564 21338991128
• Sum of all divisors σ(n): 49546210560
• Sum of proper divisors (its aliquot sum) s(n): 28207219432
• 21338991128 is an abundant number, because the sum of its proper divisors (28207219432) is greater than itself. Its abundance is 6868228304

Bases of 21338991128

• Binary: 10011110111111001110010101000011000₂
• Hexadecimal: 0x4F7E72A18
• Base-36: 9SWOMXK

Squares and roots of 21338991128

• 21338991128 squared (21338991128²) is 455352542360862712384
• 21338991128 cubed (21338991128³) is 9716763861550693593988191729152
• The square root of 21338991128 is 146078.7155200921
• The cube root of 21338991128 is 2773.6902567135

Scales and comparisons

• 21,338,991,128 seconds is equal to 678 years, 26 weeks, 5 days, 1 hour, 32 minutes, 8 seconds.
• To count from 1 to 21,338,991,128 would take you about one thousand, three hundred fifty-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 21338991128 cubic inches would be around 231.1 feet tall.

Recreational maths with 21338991128

• 21338991128 backwards is 82119983312
• The number of decimal digits it has is: 11
• The sum of 21338991128's digits is 47
• More coming soon!