21531428640

Names of 21531428640

• Cardinal: 21531428640 can be written as Twenty-one billion, five hundred thirty-one million, four hundred twenty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.153142864 × 10¹⁰

Factors of 21531428640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 81778

Divisors of 21531428640

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 61 72 80 90 96 108 120 122 135 144 160 180 183 216 240 244 270 288 305 360 366 432 480 488 540 549 610 720 732 864 915 976 1080 1098 1220 1440 1464 1647 1830 1952 2160 2196 2440 2745 2928 3294 3660 4320 4392 4880 5490 5856 6588 7320 8235 8784 9760 10980 13176 14640 16470 17568 21960 26352 29280 32940 43920 52704 65880 81707 87840 131760 163414 245121 263520 326828 408535 490242 653656 735363 817070 980484 1225605 1307312 1470726 1634140 1960968 2206089 2451210 2614624 2941452 3268280 3676815 3921936 4412178 4902420 4984127 5882904 6536560 7353630 7843872 8824356 9804840 9968254 11030445 11765808 13073120 14707260 14952381 17648712 19609680 19936508 22060890 23531616 24920635 29414520 29904762 35297424 39219360 39873016 44121780 44857143 49841270 58829040 59809524 70594848 74761905 79746032 88243560 89714286 99682540 117658080 119619048 134571429 149523810 159492064 176487120 179428572 199365080 224285715 239238096 269142858 299047620 352974240 358857144 398730160 448571430 478476192 538285716 598095240 672857145 717714288 797460320 897142860 1076571432 1196190480 1345714290 1435428576 1794285720 2153142864 2392380960 2691428580 3588571440 4306285728 5382857160 7177142880 10765714320 21531428640
• Sum of all divisors σ(n): 76596347520
• Sum of proper divisors (its aliquot sum) s(n): 55064918880
• 21531428640 is an abundant number, because the sum of its proper divisors (55064918880) is greater than itself. Its abundance is 33533490240

Bases of 21531428640

• Binary: 10100000011010111111000011100100000₂
• Hexadecimal: 0x5035F8720
• Base-36: 9W398O0

Squares and roots of 21531428640

• 21531428640 squared (21531428640²) is 463602419279412249600
• 21531428640 cubed (21531428640³) is 9982022408046025073404268544000
• The square root of 21531428640 is 146735.9146221537
• The cube root of 21531428640 is 2782.0031385185

Scales and comparisons

• 21,531,428,640 seconds is equal to 684 years, 32 weeks, 6 days, 8 hours, 24 minutes.
• To count from 1 to 21,531,428,640 would take you about one thousand, three hundred sixty-nine 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 21531428640 cubic inches would be around 231.8 feet tall.

Recreational maths with 21531428640

• 21531428640 backwards is 04682413512
• 21531428640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21531428640's digits is 36
• More coming soon!