21691934998920

Names of 21691934998920

• Cardinal: 21691934998920 can be written as Twenty-one trillion, six hundred ninety-one billion, nine hundred thirty-four million, nine hundred ninety-eight thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.169193499892 × 10¹³

Factors of 21691934998920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 20085125009

Divisors of 21691934998920

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 90 108 120 135 180 216 270 360 540 1080 20085124999 40170249998 60255374997 80340499996 100425624995 120510749994 160680999992 180766124991 200851249990 241021499988 301276874985 361532249982 401702499980 482042999976 542298374973 602553749970 723064499964 803404999960 903830624955 1084596749946 1205107499940 1446128999928 1807661249910 2169193499892 2410214999880 2711491874865 3615322499820 4338386999784 5422983749730 7230644999640 10845967499460 21691934998920
• Sum of all divisors σ(n): 72306450000000
• Sum of proper divisors (its aliquot sum) s(n): 50614515001080
• 21691934998920 is an abundant number, because the sum of its proper divisors (50614515001080) is greater than itself. Its abundance is 28922580002160

Bases of 21691934998920

• Binary: 100111011101010001100000101001000000110001000₂
• Hexadecimal: 0x13BA8C148188
• Base-36: 7OT4Y11U0

Squares and roots of 21691934998920

• 21691934998920 squared (21691934998920²) is 470540043997370420401166400
• 21691934998920 cubed (21691934998920³) is 10206924048779916082747615418950740288000
• The square root of 21691934998920 is 4657460.1446410683
• The cube root of 21691934998920 is 27888.9886013603

Scales and comparisons

• 21,691,934,998,920 seconds is equal to 689,736 years, 22 weeks, 4 days, 11 hours, 42 minutes.
• To count from 1 to 21,691,934,998,920 would take you about one million, seven hundred twenty-four thousand, three hundred forty-one 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 21691934998920 cubic inches would be around 2324.1 feet tall.

Recreational maths with 21691934998920

• 21691934998920 backwards is 02989943919612
• 21691934998920 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21691934998920's digits is 72
• More coming soon!