21002833128

Names of 21002833128

• Cardinal: 21002833128 can be written as Twenty-one billion, two million, eight hundred thirty-three thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1002833128 × 10¹⁰

Factors of 21002833128

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 875118052

Divisors of 21002833128

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 4 6 8 12 24 875118047 1750236094 2625354141 3500472188 5250708282 7000944376 10501416564 21002833128
• Sum of all divisors σ(n): 52507082880
• Sum of proper divisors (its aliquot sum) s(n): 31504249752
• 21002833128 is an abundant number, because the sum of its proper divisors (31504249752) is greater than itself. Its abundance is 10501416624

Bases of 21002833128

• Binary: 10011100011110111011100110011101000₂
• Hexadecimal: 0x4E3DDCCE8
• Base-36: 9NCJLRC

Squares and roots of 21002833128

• 21002833128 squared (21002833128²) is 441118999402614264384
• 21002833128 cubed (21002833128³) is 9264748734043439081809625713152
• The square root of 21002833128 is 144923.5423525109
• The cube root of 21002833128 is 2759.0482404105

Scales and comparisons

• 21,002,833,128 seconds is equal to 667 years, 42 weeks, 6 days, 8 hours, 18 minutes, 48 seconds.
• To count from 1 to 21,002,833,128 would take you about one thousand, three hundred thirty-five 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 21002833128 cubic inches would be around 229.9 feet tall.

Recreational maths with 21002833128

• 21002833128 backwards is 82133820012
• The number of decimal digits it has is: 11
• The sum of 21002833128's digits is 30
• More coming soon!