18211852 has 12 divisors (see below), whose sum is σ = 31939600. Its totient is φ = 9086256.

The previous prime is 18211819. The next prime is 18211859. The reversal of 18211852 is 25811281.

It is a self number, because there is not a number n which added to its sum of digits gives 18211852.

It is not an unprimeable number, because it can be changed into a prime (18211859) 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, 2727 + ... + 6622.

Almost surely, 2^18211852 is an apocalyptic number.

It is an amenable number.

18211852 is a deficient number, since it is larger than the sum of its proper divisors (13727748).

18211852 is a wasteful number, since it uses less digits than its factorization.

18211852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840 (or 9838 counting only the distinct ones).

The product of its digits is 1280, while the sum is 28.

The square root of 18211852 is about 4267.5346512946. The cubic root of 18211852 is about 263.0982972885.

The spelling of 18211852 in words is "eighteen million, two hundred eleven thousand, eight hundred fifty-two".