18185922 has 12 divisors (see below), whose sum is σ = 39402870. Its totient is φ = 6061968.

The previous prime is 18185917. The next prime is 18185941. The reversal of 18185922 is 22958181.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 114921 = 4251^2 + 339^2 .

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 5 ways as a sum of consecutive naturals, for example, 505147 + ... + 505182.

Almost surely, 2^18185922 is an apocalyptic number.

18185922 is an abundant number, since it is smaller than the sum of its proper divisors (21216948).

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

18185922 is a wasteful number, since it uses less digits than its factorization.

18185922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010337 (or 1010334 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 18185922 is about 4264.4955152984. The cubic root of 18185922 is about 262.9733716962.

The spelling of 18185922 in words is "eighteen million, one hundred eighty-five thousand, nine hundred twenty-two".