21604709840

Names of 21604709840

• Cardinal: 21604709840 can be written as Twenty-one billion, six hundred four million, seven hundred nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.160470984 × 10¹⁰

Factors of 21604709840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 231198

Divisors of 21604709840

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 167 280 334 560 668 835 1169 1336 1670 2338 2672 3340 4676 5845 6680 9352 11690 13360 18704 23380 46760 93520 231017 462034 924068 1155085 1617119 1848136 2310170 3234238 3696272 4620340 6468476 8085595 9240680 12936952 16171190 18481360 25873904 32342380 38579839 64684760 77159678 129369520 154319356 192899195 270058873 308638712 385798390 540117746 617277424 771596780 1080235492 1350294365 1543193560 2160470984 2700588730 3086387120 4320941968 5401177460 10802354920 21604709840
• Sum of all divisors σ(n): 57750803712
• Sum of proper divisors (its aliquot sum) s(n): 36146093872
• 21604709840 is an abundant number, because the sum of its proper divisors (36146093872) is greater than itself. Its abundance is 14541384032

Bases of 21604709840

• Binary: 10100000111101111011011010111010000₂
• Hexadecimal: 0x507BDB5D0
• Base-36: 9XAVWSW

Squares and roots of 21604709840

• 21604709840 squared (21604709840²) is 466763487270592825600
• 21604709840 cubed (21604709840³) is 10084289706387691561873723904000
• The square root of 21604709840 is 146985.4068946983
• The cube root of 21604709840 is 2785.1557034271

Scales and comparisons

• 21,604,709,840 seconds is equal to 686 years, 50 weeks, 12 hours, 17 minutes, 20 seconds.
• To count from 1 to 21,604,709,840 would take you about one thousand, three hundred seventy-three 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 21604709840 cubic inches would be around 232.1 feet tall.

Recreational maths with 21604709840

• 21604709840 backwards is 04890740612
• The number of decimal digits it has is: 11
• The sum of 21604709840's digits is 41
• More coming soon!