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18962880916 = 2271923173829
BaseRepresentation
bin10001101010010001…
…101001100110010100
31210221120000011022211
4101222101221212110
5302313444142131
612413400203204
71240626554050
oct215221514624
953846004284
1018962880916
118051063111
123812769504
131a328722c5
14cbc674c60
1575eba65b1
hex46a469994

18962880916 has 144 divisors (see below), whose sum is σ = 41934627840. Its totient is φ = 7339921920.

The previous prime is 18962880901. The next prime is 18962880919. The reversal of 18962880916 is 61908826981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18962880919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22873990 + ... + 22874818.

Almost surely, 218962880916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18962880916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20967313920).

18962880916 is an abundant number, since it is smaller than the sum of its proper divisors (22971746924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18962880916 is a wasteful number, since it uses less digits than its factorization.

18962880916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 58.

The spelling of 18962880916 in words is "eighteen billion, nine hundred sixty-two million, eight hundred eighty thousand, nine hundred sixteen".

Divisors: 1 2 4 7 14 19 28 31 38 62 73 76 124 133 146 217 266 292 361 434 511 532 589 722 829 868 1022 1178 1387 1444 1658 2044 2263 2356 2527 2774 3316 4123 4526 5054 5548 5803 8246 9052 9709 10108 11191 11606 15751 15841 16492 19418 22382 23212 25699 26353 31502 31682 38836 42997 44764 51398 52706 60517 63004 63364 78337 85994 102796 105412 110257 121034 156674 171988 179893 184471 220514 242068 299269 300979 313348 359786 368942 423619 441028 488281 598538 601958 719572 737884 816943 847238 976562 1149823 1197076 1203916 1633886 1694476 1876027 1953124 2094883 2299646 3267772 3417967 3752054 4189766 4599292 5718601 6835934 7504108 8048761 8379532 9277339 11437202 13132189 13671868 16097522 18554678 21846637 22874404 26264378 32195044 35644513 37109356 43693274 52528756 64941373 71289026 87386548 129882746 142578052 152926459 249511591 259765492 305852918 499023182 611705836 677245747 998046364 1354491494 2708982988 4740720229 9481440458 18962880916