21249731200

Names of 21249731200

• Cardinal: 21249731200 can be written as Twenty-one billion, two hundred forty-nine million, seven hundred thirty-one thousand, two hundred.

Scientific notation

• Scientific notation: 2.12497312 × 10¹⁰

Factors of 21249731200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 214249

Divisors of 21249731200

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 31 32 40 50 62 64 80 100 124 128 155 160 200 248 310 320 400 496 620 640 775 800 992 1240 1550 1600 1984 2480 3100 3200 3968 4960 6200 9920 12400 19840 24800 49600 99200 214211 428422 856844 1071055 1713688 2142110 3427376 4284220 5355275 6640541 6854752 8568440 10710550 13281082 13709504 17136880 21421100 26562164 27419008 33202705 34273760 42842200 53124328 66405410 68547520 85684400 106248656 132810820 137095040 166013525 171368800 212497312 265621640 332027050 342737600 424994624 531243280 664054100 685475200 849989248 1062486560 1328108200 2124973120 2656216400 4249946240 5312432800 10624865600 21249731200
• Sum of all divisors σ(n): 54187067520
• Sum of proper divisors (its aliquot sum) s(n): 32937336320
• 21249731200 is an abundant number, because the sum of its proper divisors (32937336320) is greater than itself. Its abundance is 11687605120

Bases of 21249731200

• Binary: 10011110010100101010010101010000000₂
• Hexadecimal: 0x4F2952A80
• Base-36: 9RFJHJ4

Squares and roots of 21249731200

• 21249731200 squared (21249731200²) is 451551076072253440000
• 21249731200 cubed (21249731200³) is 9595338989606137378275328000000
• The square root of 21249731200 is 145772.8753918231
• The cube root of 21249731200 is 2769.8174494249

Scales and comparisons

• 21,249,731,200 seconds is equal to 675 years, 35 weeks, 23 hours, 6 minutes, 40 seconds.
• To count from 1 to 21,249,731,200 would take you about one thousand, three hundred fifty-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 21249731200 cubic inches would be around 230.8 feet tall.

Recreational maths with 21249731200

• 21249731200 backwards is 00213794212
• 21249731200 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21249731200's digits is 31
• More coming soon!