18945922 has 16 divisors (see below), whose sum is σ = 30273912. Its totient is φ = 8861440.

The previous prime is 18945917. The next prime is 18945931. The reversal of 18945922 is 22954981.

It can be written as a sum of positive squares in 4 ways, for example, as 18584721 + 361201 = 4311^2 + 601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4272 + ... + 7492.

Almost surely, 2^18945922 is an apocalyptic number.

18945922 is a deficient number, since it is larger than the sum of its proper divisors (11327990).

18945922 is a wasteful number, since it uses less digits than its factorization.

18945922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413.

The product of its digits is 51840, while the sum is 40.

The square root of 18945922 is about 4352.6913513365. The cubic root of 18945922 is about 266.5867632131.

The spelling of 18945922 in words is "eighteen million, nine hundred forty-five thousand, nine hundred twenty-two".