18955523688 has 32 divisors (see below), whose sum is σ = 48096108960. Its totient is φ = 6224201280.

The previous prime is 18955523677. The next prime is 18955523711. The reversal of 18955523688 is 88632555981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5892523 + ... + 5895738.

It is an arithmetic number, because the mean of its divisors is an integer number (1503003405).

Almost surely, 2^18955523688 is an apocalyptic number.

It is an amenable number.

18955523688 is an abundant number, since it is smaller than the sum of its proper divisors (29140585272).

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

18955523688 is a wasteful number, since it uses less digits than its factorization.

18955523688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11788337 (or 11788333 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 60.

The spelling of 18955523688 in words is "eighteen billion, nine hundred fifty-five million, five hundred twenty-three thousand, six hundred eighty-eight".