18408922 has 16 divisors (see below), whose sum is σ = 31855680. Its totient is φ = 7815168.

The previous prime is 18408917. The next prime is 18408937. The reversal of 18408922 is 22980481.

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 7 ways as a sum of consecutive naturals, for example, 4647 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (1990980).

Almost surely, 2^18408922 is an apocalyptic number.

18408922 is a deficient number, since it is larger than the sum of its proper divisors (13446758).

18408922 is a wasteful number, since it uses less digits than its factorization.

18408922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12405.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18408922 is about 4290.5619678546. The cubic root of 18408922 is about 264.0438880968.

The spelling of 18408922 in words is "eighteen million, four hundred eight thousand, nine hundred twenty-two".