18119812 has 12 divisors (see below), whose sum is σ = 31888080. Its totient is φ = 9008936.

The previous prime is 18119797. The next prime is 18119819. The reversal of 18119812 is 21891181.

It is not an unprimeable number, because it can be changed into a prime (18119819) 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, 11938 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (2657340).

Almost surely, 2^18119812 is an apocalyptic number.

It is an amenable number.

18119812 is a deficient number, since it is larger than the sum of its proper divisors (13768268).

18119812 is a wasteful number, since it uses less digits than its factorization.

18119812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25490 (or 25488 counting only the distinct ones).

The product of its digits is 1152, while the sum is 31.

The square root of 18119812 is about 4256.7372481749. The cubic root of 18119812 is about 262.6543285995.

The spelling of 18119812 in words is "eighteen million, one hundred nineteen thousand, eight hundred twelve".