21395356884

Names of 21395356884

• Cardinal: 21395356884 can be written as Twenty-one billion, three hundred ninety-five million, three hundred fifty-six thousand, eight hundred eighty-four.

Scientific notation

• Scientific notation: 2.1395356884 × 10¹⁰

Factors of 21395356884

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3205

Divisors of 21395356884

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 9 11 12 18 22 23 33 36 44 46 66 69 92 99 132 138 198 207 253 276 396 414 506 759 828 1012 1187 1518 1979 2277 2374 3036 3561 3958 4554 4748 5937 7122 7916 9108 10683 11874 13057 14244 17811 21366 21769 23748 26114 27301 35622 39171 42732 43538 45517 52228 54602 65307 71244 78342 81903 87076 91034 109204 117513 130614 136551 156684 163806 182068 195921 235026 245709 261228 273102 300311 327612 391842 409653 470052 491418 500687 546204 600622 783684 819306 900933 982836 1001374 1201244 1502061 1638612 1801866 2002748 2349073 2702799 3004122 3603732 4506183 4698146 5405598 6008244 7047219 9012366 9396292 10811196 14094438 18024732 21141657 25839803 28188876 42283314 51679606 54028679 77519409 84566628 103359212 108057358 155038818 162086037 216114716 232558227 310077636 324172074 465116454 486258111 594315469 648344148 930232908 972516222 1188630938 1782946407 1945032444 2377261876 3565892814 5348839221 7131785628 10697678442 21395356884
• Sum of all divisors σ(n): 61647505920
• Sum of proper divisors (its aliquot sum) s(n): 40252149036
• 21395356884 is an abundant number, because the sum of its proper divisors (40252149036) is greater than itself. Its abundance is 18856792152

Bases of 21395356884

• Binary: 10011111011010000110011110011010100₂
• Hexadecimal: 0x4FB433CD4
• Base-36: 9TU8R10

Squares and roots of 21395356884

• 21395356884 squared (21395356884²) is 457761296193726189456
• 21395356884 cubed (21395356884³) is 9793966299747202625188517815104
• The square root of 21395356884 is 146271.5176785967
• The cube root of 21395356884 is 2776.1302923189

Scales and comparisons

• 21,395,356,884 seconds is equal to 680 years, 15 weeks, 6 days, 10 hours, 41 minutes, 24 seconds.
• To count from 1 to 21,395,356,884 would take you about one thousand, three hundred sixty 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 21395356884 cubic inches would be around 231.3 feet tall.

Recreational maths with 21395356884

• 21395356884 backwards is 48865359312
• The number of decimal digits it has is: 11
• The sum of 21395356884's digits is 54
• More coming soon!