21648749516

Names of 21648749516

• Cardinal: 21648749516 can be written as Twenty-one billion, six hundred forty-eight million, seven hundred forty-nine thousand, five hundred sixteen.

Scientific notation

• Scientific notation: 2.1648749516 × 10¹⁰

Factors of 21648749516

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 163

Divisors of 21648749516

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 29 53 58 79 106 116 158 212 316 841 1537 1682 2291 2809 3074 3364 4187 4582 5618 6148 8374 9164 11236 16748 24389 44573 48778 66439 81461 89146 97556 121423 132878 162922 178292 221911 242846 265756 325844 443822 485692 887644 1292617 1926731 2362369 2585234 3521267 3853462 4724738 5170468 6435419 7042534 7706924 9449476 12870838 14085068 25741676 68508701 102116743 137017402 186627151 204233486 274034804 373254302 408466972 746508604 5412187379 10824374758 21648749516
• Sum of all divisors σ(n): 40498852800
• Sum of proper divisors (its aliquot sum) s(n): 18850103284
• 21648749516 is a deficient number, because the sum of its proper divisors (18850103284) is less than itself. Its deficiency is 2798646232

Bases of 21648749516

• Binary: 10100001010010111011011001111001100₂
• Hexadecimal: 0x50A5DB3CC
• Base-36: 9Y13U18

Squares and roots of 21648749516

• 21648749516 squared (21648749516²) is 468668355606510234256
• 21648749516 cubed (21648749516³) is 10146083836600954320298626620096
• The square root of 21648749516 is 147135.1403166491
• The cube root of 21648749516 is 2787.0468667763

Scales and comparisons

• 21,648,749,516 seconds is equal to 688 years, 18 weeks, 6 days, 5 hours, 31 minutes, 56 seconds.
• To count from 1 to 21,648,749,516 would take you about one thousand, three hundred seventy-six 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 21648749516 cubic inches would be around 232.3 feet tall.

Recreational maths with 21648749516

• 21648749516 backwards is 61594784612
• 21648749516 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21648749516's digits is 53
• More coming soon!