18668906 has 16 divisors (see below), whose sum is σ = 29570400. Its totient is φ = 8815248.

The previous prime is 18668861. The next prime is 18668921. The reversal of 18668906 is 60986681.

It is a Curzon number.

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, 16280 + ... + 17388.

It is an arithmetic number, because the mean of its divisors is an integer number (1848150).

Almost surely, 2^18668906 is an apocalyptic number.

18668906 is a deficient number, since it is larger than the sum of its proper divisors (10901494).

18668906 is a wasteful number, since it uses less digits than its factorization.

18668906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 18668906 is about 4320.7529436430. The cubic root of 18668906 is about 265.2810877635.

The spelling of 18668906 in words is "eighteen million, six hundred sixty-eight thousand, nine hundred six".