18685372 has 24 divisors (see below), whose sum is σ = 33566400. Its totient is φ = 9098496.

The previous prime is 18685357. The next prime is 18685399. The reversal of 18685372 is 27358681.

It is a congruent 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, 25629 + ... + 26347.

It is an arithmetic number, because the mean of its divisors is an integer number (1398600).

Almost surely, 2^18685372 is an apocalyptic number.

It is an amenable number.

18685372 is a deficient number, since it is larger than the sum of its proper divisors (14881028).

18685372 is a wasteful number, since it uses less digits than its factorization.

18685372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 883 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 18685372 is about 4322.6579786053. The cubic root of 18685372 is about 265.3590576026.

It can be divided in two parts, 186 and 85372, that added together give a palindrome (85558).

The spelling of 18685372 in words is "eighteen million, six hundred eighty-five thousand, three hundred seventy-two".