18706768 has 20 divisors (see below), whose sum is σ = 36331380. Its totient is φ = 9330944.

The previous prime is 18706747. The next prime is 18706771. The reversal of 18706768 is 86760781.

It can be written as a sum of positive squares in 2 ways, for example, as 12194064 + 6512704 = 3492^2 + 2552^2 .

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, 6996 + ... + 9292.

It is an arithmetic number, because the mean of its divisors is an integer number (1816569).

Almost surely, 2^18706768 is an apocalyptic number.

It is an amenable number.

18706768 is a deficient number, since it is larger than the sum of its proper divisors (17624612).

18706768 is a wasteful number, since it uses less digits than its factorization.

18706768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 18706768 is about 4325.1321367098. The cubic root of 18706768 is about 265.4603035878.

The spelling of 18706768 in words is "eighteen million, seven hundred six thousand, seven hundred sixty-eight".