18297212 has 12 divisors (see below), whose sum is σ = 32050200. Its totient is φ = 9140016.

The previous prime is 18297179. The next prime is 18297217. The reversal of 18297212 is 21279281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18297217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6623 + ... + 8969.

It is an arithmetic number, because the mean of its divisors is an integer number (2670850).

Almost surely, 2^18297212 is an apocalyptic number.

It is an amenable number.

18297212 is a deficient number, since it is larger than the sum of its proper divisors (13752988).

18297212 is a wasteful number, since it uses less digits than its factorization.

18297212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4298 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 18297212 is about 4277.5240501954. The cubic root of 18297212 is about 263.5087090415.

The spelling of 18297212 in words is "eighteen million, two hundred ninety-seven thousand, two hundred twelve".