18130056 has 64 divisors (see below), whose sum is σ = 52116480. Its totient is φ = 5148480.

The previous prime is 18130039. The next prime is 18130067. The reversal of 18130056 is 65003181.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 52075 + ... + 52421.

It is an arithmetic number, because the mean of its divisors is an integer number (814320).

Almost surely, 2^18130056 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 18130056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26058240).

18130056 is an abundant number, since it is smaller than the sum of its proper divisors (33986424).

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

18130056 is a wasteful number, since it uses less digits than its factorization.

18130056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 18130056 is about 4257.9403471632. The cubic root of 18130056 is about 262.7038163105.

The spelling of 18130056 in words is "eighteen million, one hundred thirty thousand, fifty-six".