18372812 has 12 divisors (see below), whose sum is σ = 32605776. Its totient is φ = 9056880.

The previous prime is 18372799. The next prime is 18372841. The reversal of 18372812 is 21827381.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32063 + ... + 32630.

It is an arithmetic number, because the mean of its divisors is an integer number (2717148).

Almost surely, 2^18372812 is an apocalyptic number.

It is an amenable number.

18372812 is a deficient number, since it is larger than the sum of its proper divisors (14232964).

18372812 is a wasteful number, since it uses less digits than its factorization.

18372812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64768 (or 64766 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 18372812 is about 4286.3518287700. The cubic root of 18372812 is about 263.8711300937.

It can be divided in two parts, 18 and 372812, that multiplied together give a triangular number (6710616 = T₃₆₆₃).

The spelling of 18372812 in words is "eighteen million, three hundred seventy-two thousand, eight hundred twelve".