18898634528 has 48 divisors (see below), whose sum is σ = 39459661920. Its totient is φ = 8878949376.

The previous prime is 18898634527. The next prime is 18898634533. The reversal of 18898634528 is 82543689881.

It is not an unprimeable number, because it can be changed into a prime (18898634527) 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, 308675 + ... + 364797.

It is an arithmetic number, because the mean of its divisors is an integer number (822076290).

Almost surely, 2^18898634528 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 18898634528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19729830960).

18898634528 is an abundant number, since it is smaller than the sum of its proper divisors (20561027392).

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

18898634528 is a wasteful number, since it uses less digits than its factorization.

18898634528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56769 (or 56761 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The spelling of 18898634528 in words is "eighteen billion, eight hundred ninety-eight million, six hundred thirty-four thousand, five hundred twenty-eight".