18198212 has 12 divisors (see below), whose sum is σ = 32524800. Its totient is φ = 8905416.

The previous prime is 18198199. The next prime is 18198217. The reversal of 18198212 is 21289181.

It is not an unprimeable number, because it can be changed into a prime (18198217) 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, 48212 + ... + 48587.

It is an arithmetic number, because the mean of its divisors is an integer number (2710400).

Almost surely, 2^18198212 is an apocalyptic number.

It is an amenable number.

18198212 is a deficient number, since it is larger than the sum of its proper divisors (14326588).

18198212 is a wasteful number, since it uses less digits than its factorization.

18198212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96850 (or 96848 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 18198212 is about 4265.9362395610. The cubic root of 18198212 is about 263.0325972694.

The spelling of 18198212 in words is "eighteen million, one hundred ninety-eight thousand, two hundred twelve".