21381486516

Names of 21381486516

• Cardinal: 21381486516 can be written as Twenty-one billion, three hundred eighty-one million, four hundred eighty-six thousand, five hundred sixteen.

Scientific notation

• Scientific notation: 2.1381486516 × 10¹⁰

Factors of 21381486516

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 488

Divisors of 21381486516

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 9 12 13 18 26 27 36 39 52 54 78 108 117 139 156 234 278 331 351 417 468 556 662 702 834 993 1251 1324 1404 1668 1807 1986 2502 2979 3614 3753 3972 4303 5004 5421 5958 7228 7506 8606 8937 10842 11916 12909 15012 16263 17212 17874 21684 25818 32526 35748 38727 46009 48789 51636 65052 77454 92018 97578 109561 116181 138027 154908 184036 195156 219122 232362 276054 328683 414081 438244 464724 552108 598117 657366 828162 986049 1196234 1242243 1314732 1424293 1656324 1794351 1972098 2392468 2484486 2848586 2958147 3588702 3944196 4272879 4968972 5383053 5697172 5916294 7177404 8545758 10766106 11832588 12818637 15228979 16149159 17091516 21532212 25637274 30457958 32298318 38455911 45686937 51274548 60915916 64596636 76911822 91373874 137060811 153823644 182747748 197976727 274121622 395953454 411182433 548243244 593930181 791906908 822364866 1187860362 1644729732 1781790543 2375720724 3563581086 5345371629 7127162172 10690743258 21381486516
• Sum of all divisors σ(n): 60309278400
• Sum of proper divisors (its aliquot sum) s(n): 38927791884
• 21381486516 is an abundant number, because the sum of its proper divisors (38927791884) is greater than itself. Its abundance is 17546305368

Bases of 21381486516

• Binary: 10011111010011011111001011110110100₂
• Hexadecimal: 0x4FA6F97B4
• Base-36: 9TLZGL0

Squares and roots of 21381486516

• 21381486516 squared (21381486516²) is 457167965633889818256
• 21381486516 cubed (21381486516³) is 9774930692748166541670354636096
• The square root of 21381486516 is 146224.0969060845
• The cube root of 21381486516 is 2775.5302513385

Scales and comparisons

• 21,381,486,516 seconds is equal to 679 years, 44 weeks, 6 days, 21 hours, 48 minutes, 36 seconds.
• To count from 1 to 21,381,486,516 would take you about one thousand, three hundred fifty-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 21381486516 cubic inches would be around 231.3 feet tall.

Recreational maths with 21381486516

• 21381486516 backwards is 61568418312
• The number of decimal digits it has is: 11
• The sum of 21381486516's digits is 45
• More coming soon!