18955128 has 48 divisors (see below), whose sum is σ = 49570920. Its totient is φ = 6039616.

The previous prime is 18955127. The next prime is 18955163. The reversal of 18955128 is 82155981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11950 + ... + 13442.

Almost surely, 2^18955128 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 18955128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24785460).

18955128 is an abundant number, since it is smaller than the sum of its proper divisors (30615792).

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

18955128 is a wasteful number, since it uses less digits than its factorization.

18955128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1521 counting only the distinct ones).

The product of its digits is 28800, while the sum is 39.

The square root of 18955128 is about 4353.7487295433. The cubic root of 18955128 is about 266.6299352185.

The spelling of 18955128 in words is "eighteen million, nine hundred fifty-five thousand, one hundred twenty-eight".