21001662464

Names of 21001662464

• Cardinal: 21001662464 can be written as Twenty-one billion, one million, six hundred sixty-two thousand, four hundred sixty-four.

Scientific notation

• Scientific notation: 2.1001662464 × 10¹⁰

Factors of 21001662464

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 1083

Divisors of 21001662464

• Number of divisors d(n): 104
• Complete list of divisors:
  1 2 4 8 16 19 32 38 64 76 128 152 256 304 421 512 608 641 842 1024 1216 1282 1684 2048 2432 2564 3368 4096 4864 5128 6736 7999 9728 10256 12179 13472 15998 19456 20512 24358 26944 31996 38912 41024 48716 53888 63992 77824 82048 97432 107776 127984 164096 194864 215552 255968 269861 328192 389728 431104 511936 539722 656384 779456 862208 1023872 1079444 1312768 1558912 1724416 2047744 2158888 2625536 3117824 4095488 4317776 5127359 6235648 8190976 8635552 10254718 12471296 16381952 17271104 20509436 24942592 32763904 34542208 41018872 49885184 69084416 82037744 138168832 164075488 276337664 328150976 552675328 656301952 1105350656 1312603904 2625207808 5250415616 10500831232 21001662464
• Sum of all divisors σ(n): 44382769680
• Sum of proper divisors (its aliquot sum) s(n): 23381107216
• 21001662464 is an abundant number, because the sum of its proper divisors (23381107216) is greater than itself. Its abundance is 2379444752

Bases of 21001662464

• Binary: 10011100011110010111111000000000000₂
• Hexadecimal: 0x4E3CBF000
• Base-36: 9NBUIGW

Squares and roots of 21001662464

• 21001662464 squared (21001662464²) is 441069826251786551296
• 21001662464 cubed (21001662464³) is 9263199613995147427293213753344
• The square root of 21001662464 is 144919.5033941257
• The cube root of 21001662464 is 2758.9969778271

Scales and comparisons

• 21,001,662,464 seconds is equal to 667 years, 40 weeks, 6 days, 19 hours, 7 minutes, 44 seconds.
• To count from 1 to 21,001,662,464 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 21001662464 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001662464

• 21001662464 backwards is 46426610012
• 21001662464 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21001662464's digits is 32
• More coming soon!