18022668 has 12 divisors (see below), whose sum is σ = 42052920. Its totient is φ = 6007552.

The previous prime is 18022649. The next prime is 18022673. The reversal of 18022668 is 86622081.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750933 + ... + 750956.

It is an arithmetic number, because the mean of its divisors is an integer number (3504410).

Almost surely, 2^18022668 is an apocalyptic number.

It is an amenable number.

18022668 is an abundant number, since it is smaller than the sum of its proper divisors (24030252).

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

18022668 is a wasteful number, since it uses less digits than its factorization.

18022668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501896 (or 1501894 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18022668 is about 4245.3112960065. The cubic root of 18022668 is about 262.1841061721.

The spelling of 18022668 in words is "eighteen million, twenty-two thousand, six hundred sixty-eight".