18678906 has 24 divisors (see below), whose sum is σ = 40794624. Its totient is φ = 6176520.

The previous prime is 18678889. The next prime is 18678917. The reversal of 18678906 is 60987681.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1800 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (1699776).

Almost surely, 2^18678906 is an apocalyptic number.

18678906 is an abundant number, since it is smaller than the sum of its proper divisors (22115718).

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

18678906 is a wasteful number, since it uses less digits than its factorization.

18678906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8306 (or 8303 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18678906 is about 4321.9099944353. The cubic root of 18678906 is about 265.3284452494.

The spelling of 18678906 in words is "eighteen million, six hundred seventy-eight thousand, nine hundred six".