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18885268208260 = 22527891420723831
BaseRepresentation
bin1000100101101000100011…
…01100111111101010000100
32110212102011210221011210201
410102310101230333222010
54433404012130131020
6104055434503100244
73656262360104116
oct422642154775204
973772153834721
1018885268208260
116021219624953
122150112141684
13a6cb47408b3c
144940a24293b6
1522b3b0deea0a
hex112d11b3fa84

18885268208260 has 48 divisors (see below), whose sum is σ = 39677740462080. Its totient is φ = 7550550369920.

The previous prime is 18885268208243. The next prime is 18885268208327. The reversal of 18885268208260 is 6280286258881.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18885268208192 and 18885268208201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792454545 + ... + 792478375.

It is an arithmetic number, because the mean of its divisors is an integer number (826619592960).

Almost surely, 218885268208260 is an apocalyptic number.

18885268208260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18885268208260 is an abundant number, since it is smaller than the sum of its proper divisors (20792472253820).

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

18885268208260 is a wasteful number, since it uses less digits than its factorization.

18885268208260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40836 (or 40834 counting only the distinct ones).

The product of its (nonzero) digits is 47185920, while the sum is 64.

The spelling of 18885268208260 in words is "eighteen trillion, eight hundred eighty-five billion, two hundred sixty-eight million, two hundred eight thousand, two hundred sixty".

Divisors: 1 2 4 5 10 20 2789 5578 11156 13945 14207 23831 27890 28414 47662 55780 56828 71035 95324 119155 142070 238310 284140 476620 39623323 66464659 79246646 132929318 158493292 198116615 265858636 332323295 338567017 396233230 664646590 677134034 792466460 1329293180 1354268068 1692835085 3385670170 6771340340 944263410413 1888526820826 3777053641652 4721317052065 9442634104130 18885268208260