21407917720

Names of 21407917720

• Cardinal: 21407917720 can be written as Twenty-one billion, four hundred seven million, nine hundred seventeen thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.140791772 × 10¹⁰

Factors of 21407917720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 163102

Divisors of 21407917720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 28 35 40 49 56 67 70 98 134 140 196 245 268 280 335 392 469 490 536 670 938 980 1340 1876 1960 2345 2680 3283 3752 4690 6566 9380 13132 16415 18760 26264 32830 65660 131320 163021 326042 652084 815105 1141147 1304168 1630210 2282294 3260420 4564588 5705735 6520840 7988029 9129176 10922407 11411470 15976058 21844814 22822940 31952116 39940145 43689628 45645880 54612035 63904232 76456849 79880290 87379256 109224070 152913698 159760580 218448140 305827396 319521160 382284245 436896280 535197943 611654792 764568490 1070395886 1529136980 2140791772 2675989715 3058273960 4281583544 5351979430 10703958860 21407917720
• Sum of all divisors σ(n): 56868594480
• Sum of proper divisors (its aliquot sum) s(n): 35460676760
• 21407917720 is an abundant number, because the sum of its proper divisors (35460676760) is greater than itself. Its abundance is 14052759040

Bases of 21407917720

• Binary: 10011111100000000101110011010011000₂
• Hexadecimal: 0x4FC02E698
• Base-36: 9U1PZ14

Squares and roots of 21407917720

• 21407917720 squared (21407917720²) is 458298941106289998400
• 21407917720 cubed (21407917720³) is 9811226022366582060206131648000
• The square root of 21407917720 is 146314.4480904057
• The cube root of 21407917720 is 2776.6734583863

Scales and comparisons

• 21,407,917,720 seconds is equal to 680 years, 36 weeks, 4 days, 19 hours, 48 minutes, 40 seconds.
• To count from 1 to 21,407,917,720 would take you about one thousand, three hundred sixty-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 21407917720 cubic inches would be around 231.4 feet tall.

Recreational maths with 21407917720

• 21407917720 backwards is 02771970412
• 21407917720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21407917720's digits is 40
• More coming soon!