18363812 has 12 divisors (see below), whose sum is σ = 32166960. Its totient is φ = 9173256.

The previous prime is 18363799. The next prime is 18363817. The reversal of 18363812 is 21836381.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18363817) 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, 6239 + ... + 8697.

It is an arithmetic number, because the mean of its divisors is an integer number (2680580).

Almost surely, 2^18363812 is an apocalyptic number.

It is an amenable number.

18363812 is a deficient number, since it is larger than the sum of its proper divisors (13803148).

18363812 is a wasteful number, since it uses less digits than its factorization.

18363812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330 (or 4328 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 18363812 is about 4285.3018563457. The cubic root of 18363812 is about 263.8280369252.

The spelling of 18363812 in words is "eighteen million, three hundred sixty-three thousand, eight hundred twelve".