21389111168

Names of 21389111168

• Cardinal: 21389111168 can be written as Twenty-one billion, three hundred eighty-nine million, one hundred eleven thousand, one hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1389111168 × 10¹⁰

Factors of 21389111168

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 9631

Divisors of 21389111168

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 8 16 31 32 62 64 124 128 248 496 599 992 1198 1984 2396 3968 4792 8999 9584 17998 18569 19168 35996 37138 38336 71992 74276 76672 143984 148552 278969 287968 297104 557938 575936 594208 1115876 1151872 1188416 2231752 2376832 4463504 5390401 8927008 10780802 17854016 21561604 35708032 43123208 86246416 167102431 172492832 334204862 344985664 668409724 689971328 1336819448 2673638896 5347277792 10694555584 21389111168
• Sum of all divisors σ(n): 44064000000
• Sum of proper divisors (its aliquot sum) s(n): 22674888832
• 21389111168 is an abundant number, because the sum of its proper divisors (22674888832) is greater than itself. Its abundance is 1285777664

Bases of 21389111168

• Binary: 10011111010111000111110111110000000₂
• Hexadecimal: 0x4FAE3EF80
• Base-36: 9TQIVSW

Squares and roots of 21389111168

• 21389111168 squared (21389111168²) is 457494076557062324224
• 21389111168 cubed (21389111168³) is 9785391662180508748331595333632
• The square root of 21389111168 is 146250.1663862301
• The cube root of 21389111168 is 2775.8601307609

Scales and comparisons

• 21,389,111,168 seconds is equal to 680 years, 5 weeks, 4 days, 3 hours, 46 minutes, 8 seconds.
• To count from 1 to 21,389,111,168 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 21389111168 cubic inches would be around 231.3 feet tall.

Recreational maths with 21389111168

• 21389111168 backwards is 86111198312
• The number of decimal digits it has is: 11
• The sum of 21389111168's digits is 41
• More coming soon!