21287049516

Names of 21287049516

• Cardinal: 21287049516 can be written as Twenty-one billion, two hundred eighty-seven million, forty-nine thousand, five hundred sixteen.

Scientific notation

• Scientific notation: 2.1287049516 × 10¹⁰

Factors of 21287049516

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 240406

Divisors of 21287049516

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 9 12 18 23 36 46 69 92 107 138 207 214 276 321 414 428 642 828 963 1284 1926 2461 3852 4922 7383 9844 14766 22149 29532 44298 88596 240271 480542 720813 961084 1441626 2162439 2883252 4324878 5526233 8649756 11052466 16578699 22104932 25708997 33157398 49736097 51417994 66314796 77126991 99472194 102835988 154253982 198944388 231380973 308507964 462761946 591306931 925523892 1182613862 1773920793 2365227724 3547841586 5321762379 7095683172 10643524758 21287049516
• Sum of all divisors σ(n): 56673437184
• Sum of proper divisors (its aliquot sum) s(n): 35386387668
• 21287049516 is an abundant number, because the sum of its proper divisors (35386387668) is greater than itself. Its abundance is 14099338152

Bases of 21287049516

• Binary: 10011110100110011101001100100101100₂
• Hexadecimal: 0x4F4CE992C
• Base-36: 9S1RCJ0

Squares and roots of 21287049516

• 21287049516 squared (21287049516²) is 453138477096635834256
• 21287049516 cubed (21287049516³) is 9645981199560918920827441020096
• The square root of 21287049516 is 145900.8208201723
• The cube root of 21287049516 is 2771.4379322405

Scales and comparisons

• 21,287,049,516 seconds is equal to 676 years, 44 weeks, 5 days, 21 hours, 18 minutes, 36 seconds.
• To count from 1 to 21,287,049,516 would take you about one thousand, three hundred fifty-three 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 21287049516 cubic inches would be around 231 feet tall.

Recreational maths with 21287049516

• 21287049516 backwards is 61594078212
• The number of decimal digits it has is: 11
• The sum of 21287049516's digits is 45
• More coming soon!