18538056 has 24 divisors (see below), whose sum is σ = 50207430. Its totient is φ = 6179328.

The previous prime is 18538001. The next prime is 18538099. The reversal of 18538056 is 65083581.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 133956 = 4290^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 18538056.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128665 + ... + 128808.

Almost surely, 2^18538056 is an apocalyptic number.

It is an amenable number.

18538056 is an abundant number, since it is smaller than the sum of its proper divisors (31669374).

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

18538056 is a wasteful number, since it uses less digits than its factorization.

18538056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257485 (or 257478 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 18538056 is about 4305.5842809078. The cubic root of 18538056 is about 264.6598507495.

The spelling of 18538056 in words is "eighteen million, five hundred thirty-eight thousand, fifty-six".