21001680500

Names of 21001680500

• Cardinal: 21001680500 can be written as Twenty-one billion, one million, six hundred eighty thousand, five hundred.

Scientific notation

• Scientific notation: 2.10016805 × 10¹⁰

Factors of 21001680500

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 6488

Divisors of 21001680500

• Number of divisors d(n): 36
• Complete list of divisors:
  1 2 4 5 10 20 25 50 100 125 250 500 6481 12962 25924 32405 64810 129620 162025 324050 648100 810125 1620250 3240500 42003361 84006722 168013444 210016805 420033610 840067220 1050084025 2100168050 4200336100 5250420125 10500840250 21001680500
• Sum of all divisors σ(n): 45874748556
• Sum of proper divisors (its aliquot sum) s(n): 24873068056
• 21001680500 is an abundant number, because the sum of its proper divisors (24873068056) is greater than itself. Its abundance is 3871387556

Bases of 21001680500

• Binary: 10011100011110011000011011001110100₂
• Hexadecimal: 0x4E3CC3674
• Base-36: 9NBUWDW

Squares and roots of 21001680500

• 21001680500 squared (21001680500²) is 441070583824080250000
• 21001680500 cubed (21001680500³) is 9263223479421801616860125000000
• The square root of 21001680500 is 144919.5656217613
• The cube root of 21001680500 is 2758.9977676257

Scales and comparisons

• 21,001,680,500 seconds is equal to 667 years, 41 weeks, 8 minutes, 20 seconds.
• To count from 1 to 21,001,680,500 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 21001680500 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001680500

• 21001680500 backwards is 00508610012
• The number of decimal digits it has is: 11
• The sum of 21001680500's digits is 23
• More coming soon!