21050821872

Names of 21050821872

• Cardinal: 21050821872 can be written as Twenty-one billion, fifty million, eight hundred twenty-one thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 2.1050821872 × 10¹⁰

Factors of 21050821872

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 94629

Divisors of 21050821872

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 1571 3142 4713 6284 9426 12568 14139 18852 25136 28278 37704 56556 75408 93053 113112 186106 226224 279159 372212 558318 744424 837477 1116636 1488848 1674954 2233272 3349908 4466544 6699816 13399632 146186263 292372526 438558789 584745052 877117578 1169490104 1315676367 1754235156 2338980208 2631352734 3508470312 5262705468 7016940624 10525410936 21050821872
• Sum of all divisors σ(n): 58951197864
• Sum of proper divisors (its aliquot sum) s(n): 37900375992
• 21050821872 is an abundant number, because the sum of its proper divisors (37900375992) is greater than itself. Its abundance is 16849554120

Bases of 21050821872

• Binary: 10011100110101110100000110011110000₂
• Hexadecimal: 0x4E6BA0CF0
• Base-36: 9O54640

Squares and roots of 21050821872

• 21050821872 squared (21050821872²) is 443137101486673584384
• 21050821872 cubed (21050821872³) is 9328400188270352006675344846848
• The square root of 21050821872 is 145089.0136157801
• The cube root of 21050821872 is 2761.1479975447

Scales and comparisons

• 21,050,821,872 seconds is equal to 669 years, 18 weeks, 1 day, 18 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,050,821,872 would take you about one thousand, three hundred thirty-eight 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 21050821872 cubic inches would be around 230.1 feet tall.

Recreational maths with 21050821872

• 21050821872 backwards is 27812805012
• 21050821872 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21050821872's digits is 36
• More coming soon!