21638236984

Names of 21638236984

• Cardinal: 21638236984 can be written as Twenty-one billion, six hundred thirty-eight million, two hundred thirty-six thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 2.1638236984 × 10¹⁰

Factors of 21638236984

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 52828

Divisors of 21638236984

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 52 56 91 104 182 364 569 728 1138 2276 3983 4552 7397 7966 14794 15932 29588 31864 51779 52237 59176 103558 104474 207116 208948 365659 414232 417896 679081 731318 1358162 1462636 2716324 2925272 4753567 5432648 9507134 19014268 29722853 38028536 59445706 118891412 208059971 237782824 386397089 416119942 772794178 832239884 1545588356 1664479768 2704779623 3091176712 5409559246 10819118492 21638236984
• Sum of all divisors σ(n): 50023108800
• Sum of proper divisors (its aliquot sum) s(n): 28384871816
• 21638236984 is an abundant number, because the sum of its proper divisors (28384871816) is greater than itself. Its abundance is 6746634832

Bases of 21638236984

• Binary: 10100001001101111010100101100111000₂
• Hexadecimal: 0x509BD4B38
• Base-36: 9XUUIIG

Squares and roots of 21638236984

• 21638236984 squared (21638236984²) is 468213299775745416256
• 21638236984 cubed (21638236984³) is 10131310339608213372199054011904
• The square root of 21638236984 is 147099.4119090895
• The cube root of 21638236984 is 2786.5956680731

Scales and comparisons

• 21,638,236,984 seconds is equal to 688 years, 1 week, 3 days, 13 hours, 23 minutes, 4 seconds.
• To count from 1 to 21,638,236,984 would take you about one thousand, three hundred seventy-six 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 21638236984 cubic inches would be around 232.2 feet tall.

Recreational maths with 21638236984

• 21638236984 backwards is 48963283612
• 21638236984 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21638236984's digits is 52
• More coming soon!