18500000052 has 24 divisors (see below), whose sum is σ = 43334637696. Its totient is φ = 6142670848.

The previous prime is 18500000023. The next prime is 18500000059. The reversal of 18500000052 is 25000000581.

It is a junction number, because it is equal to n+sod(n) for n = 18499999974 and 18500000028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500000059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2996268 + ... + 3002435.

It is an arithmetic number, because the mean of its divisors is an integer number (1805609904).

Almost surely, 2^18500000052 is an apocalyptic number.

18500000052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18500000052 is an abundant number, since it is smaller than the sum of its proper divisors (24834637644).

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

18500000052 is a wasteful number, since it uses less digits than its factorization.

18500000052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998967 (or 5998965 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 18500000052 in words is "eighteen billion, five hundred million, fifty-two", and thus it is an aban number.