21535121920

Names of 21535121920

• Cardinal: 21535121920 can be written as Twenty-one billion, five hundred thirty-five million, one hundred twenty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.153512192 × 10¹⁰

Factors of 21535121920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 8290

Divisors of 21535121920

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 52 64 65 79 80 104 128 130 158 160 208 256 260 316 320 395 416 512 520 632 640 790 832 1027 1040 1264 1280 1580 1664 2054 2080 2528 2560 3160 3328 4108 4160 5056 5135 6320 6656 8191 8216 8320 10112 10270 12640 16382 16432 16640 20224 20540 25280 32764 32864 33280 40448 40955 41080 50560 65528 65728 81910 82160 101120 106483 131056 131456 163820 164320 202240 212966 262112 262912 327640 328640 425932 524224 525824 532415 647089 655280 657280 851864 1048448 1064830 1294178 1310560 1314560 1703728 2096896 2129660 2588356 2621120 2629120 3235445 3407456 4193792 4259320 5176712 5242240 6470890 6814912 8412157 8518640 10353424 10484480 12941780 13629824 16824314 17037280 20706848 20968960 25883560 27259648 33648628 34074560 41413696 42060785 51767120 54519296 67297256 68149120 82827392 84121570 103534240 134594512 136298240 165654784 168243140 207068480 269189024 272596480 331309568 336486280 414136960 538378048 672972560 828273920 1076756096 1345945120 1656547840 2153512192 2691890240 4307024384 5383780480 10767560960 21535121920
• Sum of all divisors σ(n): 56316395520
• Sum of proper divisors (its aliquot sum) s(n): 34781273600
• 21535121920 is an abundant number, because the sum of its proper divisors (34781273600) is greater than itself. Its abundance is 13246151680

Bases of 21535121920

• Binary: 10100000011100101111110001000000000₂
• Hexadecimal: 0x50397E200
• Base-36: 9W5GEF4

Squares and roots of 21535121920

• 21535121920 squared (21535121920²) is 463761476109264486400
• 21535121920 cubed (21535121920³) is 9987159929812177956150181888000
• The square root of 21535121920 is 146748.4988679611
• The cube root of 21535121920 is 2782.1621948343

Scales and comparisons

• 21,535,121,920 seconds is equal to 684 years, 39 weeks, 2 hours, 18 minutes, 40 seconds.
• To count from 1 to 21,535,121,920 would take you about one thousand, three hundred sixty-nine 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 21535121920 cubic inches would be around 231.8 feet tall.

Recreational maths with 21535121920

• 21535121920 backwards is 02912153512
• The number of decimal digits it has is: 11
• The sum of 21535121920's digits is 31
• More coming soon!