18545087925 has 144 divisors (see below), whose sum is σ = 43287229440. Its totient is φ = 7365150720.

The previous prime is 18545087917. The next prime is 18545087947. The reversal of 18545087925 is 52978054581.

18545087925 is a `hidden beast` number, since 1 + 8 + 545 + 0 + 8 + 7 + 92 + 5 = 666.

It is not a de Polignac number, because 18545087925 - 2³ = 18545087917 is a prime.

It is a super-2 number, since 2×18545087925² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 321436 + ... + 374714.

It is an arithmetic number, because the mean of its divisors is an integer number (300605760).

Almost surely, 2^18545087925 is an apocalyptic number.

18545087925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18545087925 is an abundant number, since it is smaller than the sum of its proper divisors (24742141515).

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

18545087925 is a wasteful number, since it uses less digits than its factorization.

18545087925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53332 (or 53324 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 18545087925 in words is "eighteen billion, five hundred forty-five million, eighty-seven thousand, nine hundred twenty-five".