21001678764

Names of 21001678764

• Cardinal: 21001678764 can be written as Twenty-one billion, one million, six hundred seventy-eight thousand, seven hundred sixty-four.

Scientific notation

• Scientific notation: 2.1001678764 × 10¹⁰

Factors of 21001678764

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 106

Divisors of 21001678764

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 11 12 22 23 33 44 46 66 67 69 92 132 134 138 201 253 268 276 402 506 529 737 759 804 1012 1058 1474 1518 1541 1587 2116 2211 2948 3036 3082 3174 4422 4489 4623 5819 6164 6348 8844 8978 9246 11638 13467 16951 17457 17956 18492 23276 26934 33902 34914 35443 49379 50853 53868 67804 69828 70886 98758 101706 103247 106329 141772 148137 197516 203412 206494 212658 296274 300763 309741 389873 412988 425316 592548 601526 619482 779746 902289 1135717 1169619 1203052 1238964 1559492 1804578 2271434 2339238 2374681 3308393 3407151 3609156 4542868 4678476 4749362 6616786 6814302 6917549 7124043 9498724 9925179 13233572 13628604 13835098 14248086 19850358 20752647 26121491 27670196 28496172 39700716 41505294 52242982 76093039 78364473 83010588 104485964 152186078 156728946 159103627 228279117 304372156 313457892 318207254 456558234 477310881 636414508 913116468 954621762 1750139897 1909243524 3500279794 5250419691 7000559588 10500839382 21001678764
• Sum of all divisors σ(n): 56730898560
• Sum of proper divisors (its aliquot sum) s(n): 35729219796
• 21001678764 is an abundant number, because the sum of its proper divisors (35729219796) is greater than itself. Its abundance is 14727541032

Bases of 21001678764

• Binary: 10011100011110011000010111110101100₂
• Hexadecimal: 0x4E3CC2FAC
• Base-36: 9NBUV1O

Squares and roots of 21001678764

• 21001678764 squared (21001678764²) is 441070510906248567696
• 21001678764 cubed (21001678764³) is 9263221182326390939086499607744
• The square root of 21001678764 is 144919.5596322319
• The cube root of 21001678764 is 2758.9976916061

Scales and comparisons

• 21,001,678,764 seconds is equal to 667 years, 40 weeks, 6 days, 23 hours, 39 minutes, 24 seconds.
• To count from 1 to 21,001,678,764 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 21001678764 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001678764

• 21001678764 backwards is 46787610012
• The number of decimal digits it has is: 11
• The sum of 21001678764's digits is 42
• More coming soon!