18022056 has 64 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 5422848.

The previous prime is 18022027. The next prime is 18022061. The reversal of 18022056 is 65022081.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14050 + ... + 15278.

It is an arithmetic number, because the mean of its divisors is an integer number (774900).

Almost surely, 2^18022056 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 18022056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24796800).

18022056 is an abundant number, since it is smaller than the sum of its proper divisors (31571544).

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

18022056 is a wasteful number, since it uses less digits than its factorization.

18022056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18022056 is about 4245.2392158746. The cubic root of 18022056 is about 262.1811384559.

The spelling of 18022056 in words is "eighteen million, twenty-two thousand, fifty-six".