18550056 has 64 divisors (see below), whose sum is σ = 53539200. Its totient is φ = 5246208.

The previous prime is 18550033. The next prime is 18550067. The reversal of 18550056 is 65005581.

It is a happy 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, 17806 + ... + 18818.

It is an arithmetic number, because the mean of its divisors is an integer number (836550).

Almost surely, 2^18550056 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 18550056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26769600).

18550056 is an abundant number, since it is smaller than the sum of its proper divisors (34989144).

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

18550056 is a wasteful number, since it uses less digits than its factorization.

18550056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 18550056 is about 4306.9775945551. The cubic root of 18550056 is about 264.7169447113.

The spelling of 18550056 in words is "eighteen million, five hundred fifty thousand, fifty-six".