18407668 has 12 divisors (see below), whose sum is σ = 34108452. Its totient is φ = 8662400.

The previous prime is 18407629. The next prime is 18407671. The reversal of 18407668 is 86670481.

It can be written as a sum of positive squares in 2 ways, for example, as 15776784 + 2630884 = 3972^2 + 1622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18407668.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 135283 + ... + 135418.

It is an arithmetic number, because the mean of its divisors is an integer number (2842371).

Almost surely, 2^18407668 is an apocalyptic number.

It is an amenable number.

18407668 is a deficient number, since it is larger than the sum of its proper divisors (15700784).

18407668 is a wasteful number, since it uses less digits than its factorization.

18407668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270722 (or 270720 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18407668 is about 4290.4158306626. The cubic root of 18407668 is about 264.0378924795.

The spelling of 18407668 in words is "eighteen million, four hundred seven thousand, six hundred sixty-eight".