18786704 has 20 divisors (see below), whose sum is σ = 36498780. Its totient is φ = 9367680.

The previous prime is 18786701. The next prime is 18786709. The reversal of 18786704 is 40768781.

It can be written as a sum of positive squares in 2 ways, for example, as 4194304 + 14592400 = 2048^2 + 3820^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18786701) by changing a digit.

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, 5342 + ... + 8130.

It is an arithmetic number, because the mean of its divisors is an integer number (1824939).

Almost surely, 2^18786704 is an apocalyptic number.

It is an amenable number.

18786704 is a deficient number, since it is larger than the sum of its proper divisors (17712076).

18786704 is a wasteful number, since it uses less digits than its factorization.

18786704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 18786704 is about 4334.3631596810. The cubic root of 18786704 is about 265.8378796164.

The spelling of 18786704 in words is "eighteen million, seven hundred eighty-six thousand, seven hundred four".