18889728928 has 48 divisors (see below), whose sum is σ = 43369300800. Its totient is φ = 8095593408.

The previous prime is 18889728889. The next prime is 18889728929. The reversal of 18889728928 is 82982798881.

It is not an unprimeable number, because it can be changed into a prime (18889728929) 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, 849526 + ... + 871477.

It is an arithmetic number, because the mean of its divisors is an integer number (903527100).

Almost surely, 2^18889728928 is an apocalyptic number.

It is an amenable number.

18889728928 is an abundant number, since it is smaller than the sum of its proper divisors (24479571872).

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

18889728928 is an equidigital number, since it uses as much as digits as its factorization.

18889728928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721034 (or 1721012 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 70.

The spelling of 18889728928 in words is "eighteen billion, eight hundred eighty-nine million, seven hundred twenty-eight thousand, nine hundred twenty-eight".