18736864 has 24 divisors (see below), whose sum is σ = 37036440. Its totient is φ = 9330816.

The previous prime is 18736859. The next prime is 18736889. The reversal of 18736864 is 46863781.

It is a self number, because there is not a number n which added to its sum of digits gives 18736864.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8022 + ... + 10090.

It is an arithmetic number, because the mean of its divisors is an integer number (1543185).

Almost surely, 2^18736864 is an apocalyptic number.

It is an amenable number.

18736864 is a deficient number, since it is larger than the sum of its proper divisors (18299576).

18736864 is a wasteful number, since it uses less digits than its factorization.

18736864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362 (or 2354 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 18736864 is about 4328.6099385369. The cubic root of 18736864 is about 265.6025874331.

It can be divided in two parts, 18736 and 864, that added together give a square (19600 = 140²).

The spelling of 18736864 in words is "eighteen million, seven hundred thirty-six thousand, eight hundred sixty-four".