21153898958440

Names of 21153898958440

• Cardinal: 21153898958440 can be written as Twenty-one trillion, one hundred fifty-three billion, eight hundred ninety-eight million, nine hundred fifty-eight thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.115389895844 × 10¹³

Factors of 21153898958440

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 8267

Divisors of 21153898958440

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 8 10 20 40 89 178 356 445 712 890 1780 3560 7921 8171 15842 16342 31684 32684 39605 40855 63368 65368 79210 81710 158420 163420 316840 326840 727219 1454438 2908876 3636095 5817752 7272190 14544380 29088760 64722491 66765241 129444982 133530482 258889964 267060964 323612455 333826205 517779928 534121928 647224910 667652410 1294449820 1335304820 2588899640 2670609640 5942106449 11884212898 23768425796 29710532245 47536851592 59421064490 118842128980 237684257960 528847473961 1057694947922 2115389895844 2644237369805 4230779791688 5288474739610 10576949479220 21153898958440
• Sum of all divisors σ(n): 48142963038870
• Sum of proper divisors (its aliquot sum) s(n): 26989064080430
• 21153898958440 is an abundant number, because the sum of its proper divisors (26989064080430) is greater than itself. Its abundance is 5835165121990

Bases of 21153898958440

• Binary: 100110011110101000110101000100000111001101000₂
• Hexadecimal: 0x133D46A20E68
• Base-36: 7HXYT9G14

Squares and roots of 21153898958440

• 21153898958440 squared (21153898958440²) is 447487441143888916847233600
• 21153898958440 cubed (21153898958440³) is 9466104115128692560265754619635371584000
• The square root of 21153898958440 is 4599336.7954999773
• The cube root of 21153898958440 is 27656.4739130659

Scales and comparisons

• 21,153,898,958,440 seconds is equal to 672,628 years, 28 weeks, 5 days, 12 hours, 40 seconds.
• To count from 1 to 21,153,898,958,440 would take you about one million, six hundred eighty-one thousand, five hundred seventy-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 21153898958440 cubic inches would be around 2304.7 feet tall.

Recreational maths with 21153898958440

• 21153898958440 backwards is 04485989835112
• The number of decimal digits it has is: 14
• The sum of 21153898958440's digits is 67
• More coming soon!