18909322 has 8 divisors (see below), whose sum is σ = 28967616. Its totient is φ = 9253452.

The previous prime is 18909311. The next prime is 18909337. The reversal of 18909322 is 22390981.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 100488 + ... + 100675.

It is an arithmetic number, because the mean of its divisors is an integer number (3620952).

Almost surely, 2^18909322 is an apocalyptic number.

18909322 is a deficient number, since it is larger than the sum of its proper divisors (10058294).

18909322 is a wasteful number, since it uses less digits than its factorization.

18909322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201212.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18909322 is about 4348.4850235456. The cubic root of 18909322 is about 266.4149871929.

The spelling of 18909322 in words is "eighteen million, nine hundred nine thousand, three hundred twenty-two".