18107812 has 12 divisors (see below), whose sum is σ = 31997056. Its totient is φ = 8965800.

The previous prime is 18107801. The next prime is 18107849. The reversal of 18107812 is 21870181.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

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, 21564 + ... + 22387.

Almost surely, 2^18107812 is an apocalyptic number.

It is an amenable number.

18107812 is a deficient number, since it is larger than the sum of its proper divisors (13889244).

18107812 is a wasteful number, since it uses less digits than its factorization.

18107812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44058 (or 44056 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 18107812 is about 4255.3274844599. The cubic root of 18107812 is about 262.5963341056.

Adding to 18107812 its reverse (21870181), we get a palindrome (39977993).

The spelling of 18107812 in words is "eighteen million, one hundred seven thousand, eight hundred twelve".