18022956 has 24 divisors (see below), whose sum is σ = 48061440. Its totient is φ = 5149392.

The previous prime is 18022943. The next prime is 18022957. The reversal of 18022956 is 65922081.

It is not an unprimeable number, because it can be changed into a prime (18022957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107196 + ... + 107363.

It is an arithmetic number, because the mean of its divisors is an integer number (2002560).

Almost surely, 2^18022956 is an apocalyptic number.

It is an amenable number.

18022956 is an abundant number, since it is smaller than the sum of its proper divisors (30038484).

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

18022956 is a wasteful number, since it uses less digits than its factorization.

18022956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214573 (or 214571 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18022956 is about 4245.3452156450. The cubic root of 18022956 is about 262.1855027211.

The spelling of 18022956 in words is "eighteen million, twenty-two thousand, nine hundred fifty-six".