18814216 has 16 divisors (see below), whose sum is σ = 35323200. Its totient is φ = 9394704.

The previous prime is 18814193. The next prime is 18814247. The reversal of 18814216 is 61241881.

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, 9661 + ... + 11443.

It is an arithmetic number, because the mean of its divisors is an integer number (2207700).

Almost surely, 2^18814216 is an apocalyptic number.

It is an amenable number.

18814216 is a deficient number, since it is larger than the sum of its proper divisors (16508984).

18814216 is a wasteful number, since it uses less digits than its factorization.

18814216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108 (or 3104 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 18814216 is about 4337.5357059049. The cubic root of 18814216 is about 265.9675841931.

The spelling of 18814216 in words is "eighteen million, eight hundred fourteen thousand, two hundred sixteen".