18395812 has 12 divisors (see below), whose sum is σ = 32428620. Its totient is φ = 9130496.

The previous prime is 18395809. The next prime is 18395813. The reversal of 18395812 is 21859381.

It can be written as a sum of positive squares in 2 ways, for example, as 5262436 + 13133376 = 2294^2 + 3624^2 .

It is not an unprimeable number, because it can be changed into a prime (18395813) 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, 16237 + ... + 17332.

It is an arithmetic number, because the mean of its divisors is an integer number (2702385).

Almost surely, 2^18395812 is an apocalyptic number.

It is an amenable number.

18395812 is a deficient number, since it is larger than the sum of its proper divisors (14032808).

18395812 is a wasteful number, since it uses less digits than its factorization.

18395812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33710 (or 33708 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 18395812 is about 4289.0339238574. The cubic root of 18395812 is about 263.9811931812.

The spelling of 18395812 in words is "eighteen million, three hundred ninety-five thousand, eight hundred twelve".