21028133888

Names of 21028133888

• Cardinal: 21028133888 can be written as Twenty-one billion, twenty-eight million, one hundred thirty-three thousand, eight hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1028133888 × 10¹⁰

Factors of 21028133888

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 710

Divisors of 21028133888

• Number of divisors d(n): 66
• Complete list of divisors:
  1 2 4 8 16 32 47 64 94 128 188 256 376 512 661 752 1024 1322 1504 2644 3008 5288 6016 10576 12032 21152 24064 31067 42304 48128 62134 84608 124268 169216 248536 338432 436921 497072 676864 873842 994144 1747684 1988288 3495368 3976576 6990736 7953152 13981472 15906304 20535287 27962944 31812608 41070574 55925888 82141148 111851776 164282296 223703552 328564592 447407104 657129184 1314258368 2628516736 5257033472 10514066944 21028133888
• Sum of all divisors σ(n): 42995155248
• Sum of proper divisors (its aliquot sum) s(n): 21967021360
• 21028133888 is an abundant number, because the sum of its proper divisors (21967021360) is greater than itself. Its abundance is 938887472

Bases of 21028133888

• Binary: 10011100101010111111101110000000000₂
• Hexadecimal: 0x4E55FDC00
• Base-36: 9NRLVY8

Squares and roots of 21028133888

• 21028133888 squared (21028133888²) is 442182414811653996544
• 21028133888 cubed (21028133888³) is 9298271021578614542057521283072
• The square root of 21028133888 is 145010.8061076829
• The cube root of 21028133888 is 2760.1556783993

Scales and comparisons

• 21,028,133,888 seconds is equal to 668 years, 32 weeks, 5 days, 4 hours, 18 minutes, 8 seconds.
• To count from 1 to 21,028,133,888 would take you about one thousand, three hundred thirty-seven 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 21028133888 cubic inches would be around 230 feet tall.

Recreational maths with 21028133888

• 21028133888 backwards is 88833182012
• The number of decimal digits it has is: 11
• The sum of 21028133888's digits is 44
• More coming soon!