21491889328

Names of 21491889328

• Cardinal: 21491889328 can be written as Twenty-one billion, four hundred ninety-one million, eight hundred eighty-nine thousand, three hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1491889328 × 10¹⁰

Factors of 21491889328

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 526

Divisors of 21491889328

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 7 8 13 14 16 17 26 28 29 34 52 56 58 68 79 91 104 112 116 119 136 158 182 203 208 221 232 238 272 316 364 377 379 406 442 464 476 493 553 632 728 754 758 812 884 952 986 1027 1106 1264 1343 1456 1508 1516 1547 1624 1768 1904 1972 2054 2212 2291 2639 2653 2686 3016 3032 3094 3248 3451 3536 3944 4108 4424 4582 4927 5278 5306 5372 6032 6064 6188 6409 6443 6902 7189 7888 8216 8848 9164 9401 9854 10556 10612 10744 10991 12376 12818 12886 13804 14378 16037 16432 17459 18328 18802 19708 21112 21224 21488 21982 24752 25636 25772 27608 28756 29783 29941 32074 34489 34918 36656 37604 38947 39416 42224 42448 43964 44863 45101 51272 51544 55216 57512 59566 59882 64148 68978 69836 75208 76937 77894 78832 83759 87928 89726 90202 102544 103088 115024 119132 119764 122213 128296 137956 139672 142883 150416 153874 155788 167518 175856 179452 180404 186847 208481 209587 238264 239528 244426 256592 272629 275912 279344 285766 307748 311576 335036 358904 360808 373694 389233 416962 419174 476528 479056 488852 506311 508997 545258 551824 571532 586313 615496 623152 670072 717808 721616 747388 778466 833924 838348 868289 977704 1000181 1012622 1017994 1090516 1143064 1172626 1230992 1307929 1340144 1494776 1556932 1667848 1676696 1736578 1955408 2000362 2025244 2035988 2181032 2286128 2345252 2429011 2615858 2724631 2989552 3113864 3335696 3353392 3473156 3544177 3562979 4000724 4050488 4071976 4362064 4690504 4858022 5231716 5449262 6078023 6227728 6616961 6946312 7088354 7125958 8001448 8100976 8143952 9381008 9716044 10463432 10898524 11287757 12156046 13233922 13892624 14176708 14251916 14760913 16002896 17003077 19432088 20926864 21797048 22575514 24312092 26467844 28353416 28503832 29521826 34006154 38864176 43594096 45151028 46318727 48624184 52935688 56706832 57007664 59043652 68012308 79014299 90302056 92637454 97248368 103326391 105871376 118087304 136024616 158028598 180604112 185274908 191891869 206652782 236174608 272049232 316057196 370549816 383783738 413305564 632114392 741099632 767567476 826611128 1264228784 1343243083 1535134952 1653222256 2686486166 3070269904 5372972332 10745944664 21491889328
• Sum of all divisors σ(n): 56996352000
• Sum of proper divisors (its aliquot sum) s(n): 35504462672
• 21491889328 is an abundant number, because the sum of its proper divisors (35504462672) is greater than itself. Its abundance is 14012573344

Bases of 21491889328

• Binary: 10100000001000001000011010010110000₂
• Hexadecimal: 0x5010434B0
• Base-36: 9VFPRXS

Squares and roots of 21491889328

• 21491889328 squared (21491889328²) is 461901306887000291584
• 21491889328 cubed (21491889328³) is 9927131768073974468627057815552
• The square root of 21491889328 is 146601.1232153423
• The cube root of 21491889328 is 2780.2991814375

Scales and comparisons

• 21,491,889,328 seconds is equal to 683 years, 19 weeks, 3 days, 17 hours, 15 minutes, 28 seconds.
• To count from 1 to 21,491,889,328 would take you about one thousand, three hundred sixty-six 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 21491889328 cubic inches would be around 231.7 feet tall.

Recreational maths with 21491889328

• 21491889328 backwards is 82398819412
• The number of decimal digits it has is: 11
• The sum of 21491889328's digits is 55
• More coming soon!