18668254528 has 112 divisors (see below), whose sum is σ = 48616819200. Its totient is φ = 6890503680.

The previous prime is 18668254513. The next prime is 18668254597. The reversal of 18668254528 is 82545286681.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

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, 6058 + ... + 193321.

Almost surely, 2^18668254528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18668254528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24308409600).

18668254528 is an abundant number, since it is smaller than the sum of its proper divisors (29948564672).

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

18668254528 is a wasteful number, since it uses less digits than its factorization.

18668254528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199428 (or 199418 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 55.

The spelling of 18668254528 in words is "eighteen billion, six hundred sixty-eight million, two hundred fifty-four thousand, five hundred twenty-eight".