18555187052 has 12 divisors (see below), whose sum is σ = 32474724240. Its totient is φ = 9276694416.

The previous prime is 18555187033. The next prime is 18555187069. The reversal of 18555187052 is 25078155581.

It is a junction number, because it is equal to n+sod(n) for n = 18555186988 and 18555187006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177227 + ... + 261762.

It is an arithmetic number, because the mean of its divisors is an integer number (2706227020).

Almost surely, 2^18555187052 is an apocalyptic number.

It is an amenable number.

18555187052 is a deficient number, since it is larger than the sum of its proper divisors (13919537188).

18555187052 is a wasteful number, since it uses less digits than its factorization.

18555187052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449560 (or 449558 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 47.

The spelling of 18555187052 in words is "eighteen billion, five hundred fifty-five million, one hundred eighty-seven thousand, fifty-two".