21355757568

Names of 21355757568

• Cardinal: 21355757568 can be written as Twenty-one billion, three hundred fifty-five million, seven hundred fifty-seven thousand, five hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1355757568 × 10¹⁰

Factors of 21355757568

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 24
• Sum of prime factors: 154

Divisors of 21355757568

• Number of divisors d(n): 272
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 81 96 108 128 144 149 162 192 216 243 256 288 298 324 384 432 447 486 512 576 596 648 729 768 864 894 972 1024 1152 1192 1296 1341 1458 1536 1728 1788 1944 2048 2187 2304 2384 2592 2682 2916 3072 3456 3576 3888 4023 4096 4374 4608 4768 5184 5364 5832 6144 6912 7152 7776 8046 8192 8748 9216 9536 10368 10728 11664 12069 12288 13824 14304 15552 16092 16384 17496 18432 19072 20736 21456 23328 24138 24576 27648 28608 31104 32184 32768 34992 36207 36864 38144 41472 42912 46656 48276 49152 55296 57216 62208 64368 65536 69984 72414 73728 76288 82944 85824 93312 96552 98304 108621 110592 114432 124416 128736 139968 144828 147456 152576 165888 171648 186624 193104 196608 217242 221184 228864 248832 257472 279936 289656 294912 305152 325863 331776 343296 373248 386208 434484 442368 457728 497664 514944 559872 579312 589824 610304 651726 663552 686592 746496 772416 868968 884736 915456 995328 1029888 1119744 1158624 1220608 1303452 1327104 1373184 1492992 1544832 1737936 1769472 1830912 1990656 2059776 2239488 2317248 2441216 2606904 2654208 2746368 2985984 3089664 3475872 3661824 3981312 4119552 4478976 4634496 4882432 5213808 5308416 5492736 5971968 6179328 6951744 7323648 7962624 8239104 8957952 9268992 9764864 10427616 10985472 11943936 12358656 13903488 14647296 15925248 16478208 17915904 18537984 20855232 21970944 23887872 24717312 27806976 29294592 32956416 35831808 37075968 41710464 43941888 47775744 49434624 55613952 65912832 71663616 74151936 83420928 87883776 98869248 111227904 131825664 143327232 148303872 166841856 197738496 222455808 263651328 296607744 333683712 395476992 444911616 593215488 667367424 790953984 889823232 1186430976 1334734848 1779646464 2372861952 2669469696 3559292928 5338939392 7118585856 10677878784 21355757568
• Sum of all divisors σ(n): 64486932000
• Sum of proper divisors (its aliquot sum) s(n): 43131174432
• 21355757568 is an abundant number, because the sum of its proper divisors (43131174432) is greater than itself. Its abundance is 21775416864

Bases of 21355757568

• Binary: 10011111000111001110000000000000000₂
• Hexadecimal: 0x4F8E70000
• Base-36: 9T6O000

Squares and roots of 21355757568

• 21355757568 squared (21355757568²) is 456068381303189274624
• 21355757568 cubed (21355757568³) is 9739685785541094054087918354432
• The square root of 21355757568 is 146136.0926260177
• The cube root of 21355757568 is 2774.4165131139

Scales and comparisons

• 21,355,757,568 seconds is equal to 679 years, 2 weeks, 3 days, 2 hours, 52 minutes, 48 seconds.
• To count from 1 to 21,355,757,568 would take you about one thousand, three hundred fifty-eight 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 21355757568 cubic inches would be around 231.2 feet tall.

Recreational maths with 21355757568

• 21355757568 backwards is 86575755312
• 21355757568 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21355757568's digits is 54
• More coming soon!