18407812 has 12 divisors (see below), whose sum is σ = 32253760. Its totient is φ = 9192456.

The previous prime is 18407803. The next prime is 18407819. The reversal of 18407812 is 21870481.

It is not an unprimeable number, because it can be changed into a prime (18407819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489 + ... + 6247.

Almost surely, 2^18407812 is an apocalyptic number.

It is an amenable number.

18407812 is a deficient number, since it is larger than the sum of its proper divisors (13845948).

18407812 is a wasteful number, since it uses less digits than its factorization.

18407812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730 (or 5728 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18407812 is about 4290.4326122199. The cubic root of 18407812 is about 264.0385809853.

The spelling of 18407812 in words is "eighteen million, four hundred seven thousand, eight hundred twelve".