21197617920

Names of 21197617920

• Cardinal: 21197617920 can be written as Twenty-one billion, one hundred ninety-seven million, six hundred seventeen thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.119761792 × 10¹⁰

Factors of 21197617920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 613367

Divisors of 21197617920

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 64 72 80 90 96 108 120 128 135 144 160 180 192 216 240 256 270 288 320 360 384 432 480 540 576 640 720 768 864 960 1080 1152 1280 1440 1728 1920 2160 2304 2880 3456 3840 4320 5760 6912 8640 11520 17280 34560 613357 1226714 1840071 2453428 3066785 3680142 4906856 5520213 6133570 7360284 9200355 9813712 11040426 12267140 14720568 16560639 18400710 19627424 22080852 24534280 27601065 29441136 33121278 36801420 39254848 44161704 49068560 55202130 58882272 66242556 73602840 78509696 82803195 88323408 98137120 110404260 117764544 132485112 147205680 157019392 165606390 176646816 196274240 220808520 235529088 264970224 294411360 331212780 353293632 392548480 441617040 471058176 529940448 588822720 662425560 706587264 785096960 883234080 1059880896 1177645440 1324851120 1413174528 1766468160 2119761792 2355290880 2649702240 3532936320 4239523584 5299404480 7065872640 10598808960 21197617920
• Sum of all divisors σ(n): 75222225120
• Sum of proper divisors (its aliquot sum) s(n): 54024607200
• 21197617920 is an abundant number, because the sum of its proper divisors (54024607200) is greater than itself. Its abundance is 32826989280

Bases of 21197617920

• Binary: 10011101111011110011111101100000000₂
• Hexadecimal: 0x4EF79FB00
• Base-36: 9QKIIO0

Squares and roots of 21197617920

• 21197617920 squared (21197617920²) is 449339005482305126400
• 21197617920 cubed (21197617920³) is 9524916554766689390284505088000
• The square root of 21197617920 is 145594.0174595097
• The cube root of 21197617920 is 2767.5513434119

Scales and comparisons

• 21,197,617,920 seconds is equal to 674 years, 6 days, 19 hours, 12 minutes.
• To count from 1 to 21,197,617,920 would take you about one thousand, three hundred forty-eight 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 21197617920 cubic inches would be around 230.6 feet tall.

Recreational maths with 21197617920

• 21197617920 backwards is 02971679112
• 21197617920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21197617920's digits is 45
• More coming soon!