18347212 has 12 divisors (see below), whose sum is σ = 34577536. Its totient is φ = 8467920.

The previous prime is 18347209. The next prime is 18347221. The reversal of 18347212 is 21274381.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176364 + ... + 176467.

Almost surely, 2^18347212 is an apocalyptic number.

It is an amenable number.

18347212 is a deficient number, since it is larger than the sum of its proper divisors (16230324).

18347212 is a wasteful number, since it uses less digits than its factorization.

18347212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352848 (or 352846 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 18347212 is about 4283.3645653855. The cubic root of 18347212 is about 263.7485170211.

The spelling of 18347212 in words is "eighteen million, three hundred forty-seven thousand, two hundred twelve".