21328902789638401

Names of 21328902789638401

• Cardinal: 21328902789638401 can be written as Twenty-one quadrillion, three hundred twenty-eight trillion, nine hundred two billion, seven hundred eighty-nine million, six hundred thirty-eight thousand, four hundred one.

Scientific notation

• Scientific notation: 2.1328902789638401 × 10¹⁶

Factors of 21328902789638401

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 195678007244498

Divisors of 21328902789638401

• Number of divisors d(n): 4
• Complete list of divisors:
  1 109 195678007244389 21328902789638401
• Sum of all divisors σ(n): 21524580796882900
• Sum of proper divisors (its aliquot sum) s(n): 195678007244499
• 21328902789638401 is a deficient number, because the sum of its proper divisors (195678007244499) is less than itself. Its deficiency is 21133224782393902

Bases of 21328902789638401

• Binary: 1001011110001101000011000101010001110011010100100000001₂
• Hexadecimal: 0x4BC6862A39A901
• Base-36: 5U0GQO90001

Squares and roots of 21328902789638401

• 21328902789638401 squared (21328902789638401²) is 454922094209844764260208333836801
• 21328902789638401 cubed (21328902789638401³) is 9702989124260501463552264160641269180267736595201
• The square root of 21328902789638401 is 146044180.9509656601
• The cube root of 21328902789638401 is 277325.3086145615

Scales and comparisons

• 21,328,902,789,638,401 seconds is equal to 678,193,134 years, 4 weeks, 2 days, 1 second.
• To count from 1 to 21,328,902,789,638,401 would take you about two billion, thirty-four million, five hundred seventy-nine thousand, four hundred 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 21328902789638401 cubic inches would be around 23110.4 feet tall.

Recreational maths with 21328902789638401

• 21328902789638401 backwards is 10483698720982312
• The number of decimal digits it has is: 17
• The sum of 21328902789638401's digits is 73
• More coming soon!