21209987200

Names of 21209987200

• Cardinal: 21209987200 can be written as Twenty-one billion, two hundred nine million, nine hundred eighty-seven thousand, two hundred.

Scientific notation

• Scientific notation: 2.12099872 × 10¹⁰

Factors of 21209987200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7585

Divisors of 21209987200

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 320 400 640 800 1009 1600 2018 3200 4036 5045 6569 8072 10090 13138 16144 20180 25225 26276 32288 32845 40360 50450 52552 64576 65690 80720 100900 105104 129152 131380 161440 164225 201800 210208 262760 322880 328450 403600 420416 525520 645760 656900 807200 840832 1051040 1313800 1614400 2102080 2627600 3228800 4204160 5255200 6628121 10510400 13256242 21020800 26512484 33140605 53024968 66281210 106049936 132562420 165703025 212099872 265124840 331406050 424199744 530249680 662812100 848399488 1060499360 1325624200 2120998720 2651248400 4241997440 5302496800 10604993600 21209987200
• Sum of all divisors σ(n): 52455208500
• Sum of proper divisors (its aliquot sum) s(n): 31245221300
• 21209987200 is an abundant number, because the sum of its proper divisors (31245221300) is greater than itself. Its abundance is 10035234100

Bases of 21209987200

• Binary: 10011110000001101101011100010000000₂
• Hexadecimal: 0x4F036B880
• Base-36: 9QRVMV4

Squares and roots of 21209987200

• 21209987200 squared (21209987200²) is 449863557024163840000
• 21209987200 cubed (21209987200³) is 9541600286228985137102848000000
• The square root of 21209987200 is 145636.4899329835
• The cube root of 21209987200 is 2768.0895479289

Scales and comparisons

• 21,209,987,200 seconds is equal to 674 years, 21 weeks, 2 days, 23 hours, 6 minutes, 40 seconds.
• To count from 1 to 21,209,987,200 would take you about one thousand, three hundred forty-eight 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 21209987200 cubic inches would be around 230.7 feet tall.

Recreational maths with 21209987200

• 21209987200 backwards is 00278990212
• 21209987200 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21209987200's digits is 40
• More coming soon!