21007567728

Names of 21007567728

• Cardinal: 21007567728 can be written as Twenty-one billion, seven million, five hundred sixty-seven thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1007567728 × 10¹⁰

Factors of 21007567728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 110281

Divisors of 21007567728

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 36 42 48 49 54 56 63 72 81 84 98 108 112 126 144 147 162 168 189 196 216 243 252 294 324 336 378 392 432 441 486 504 567 588 648 756 784 882 972 1008 1134 1176 1296 1323 1512 1701 1764 1944 2268 2352 2646 3024 3402 3528 3888 3969 4536 5292 6804 7056 7938 9072 10584 11907 13608 15876 21168 23814 27216 31752 47628 63504 95256 110269 190512 220538 330807 441076 661614 771883 882152 992421 1323228 1543766 1764304 1984842 2315649 2646456 2977263 3087532 3969684 4631298 5292912 5403181 5954526 6175064 6946947 7939368 8931789 9262596 10806362 11909052 12350128 13893894 15878736 16209543 17863578 18525192 20840841 21612724 23818104 26795367 27787788 32419086 35727156 37050384 41681682 43225448 47636208 48628629 53590734 55575576 62522523 64838172 71454312 83363364 86450896 97257258 107181468 111151152 125045046 129676344 142908624 145885887 166726728 187567569 194514516 214362936 250090092 259352688 291771774 333453456 375135138 389029032 428725872 437657661 500180184 583543548 750270276 778058064 875315322 1000360368 1167087096 1312972983 1500540552 1750630644 2334174192 2625945966 3001081104 3501261288 5251891932 7002522576 10503783864 21007567728
• Sum of all divisors σ(n): 70924340760
• Sum of proper divisors (its aliquot sum) s(n): 49916773032
• 21007567728 is an abundant number, because the sum of its proper divisors (49916773032) is greater than itself. Its abundance is 28909205304

Bases of 21007567728

• Binary: 10011100100001001100000101101110000₂
• Hexadecimal: 0x4E4260B70
• Base-36: 9NFD300

Squares and roots of 21007567728

• 21007567728 squared (21007567728²) is 441317901846507081984
• 21007567728 cubed (21007567728³) is 9271015712619353785010528612352
• The square root of 21007567728 is 144939.8762521893
• The cube root of 21007567728 is 2759.2555459085

Scales and comparisons

• 21,007,567,728 seconds is equal to 667 years, 50 weeks, 5 days, 3 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,007,567,728 would take you about one thousand, three hundred thirty-five 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 21007567728 cubic inches would be around 229.9 feet tall.

Recreational maths with 21007567728

• 21007567728 backwards is 82776570012
• The number of decimal digits it has is: 11
• The sum of 21007567728's digits is 45
• More coming soon!