18468218 has 16 divisors (see below), whose sum is σ = 29211840. Its totient is φ = 8739456.

The previous prime is 18468211. The next prime is 18468251. The reversal of 18468218 is 81286481.

It is not an unprimeable number, because it can be changed into a prime (18468211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2393 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^18468218 is an apocalyptic number.

18468218 is a deficient number, since it is larger than the sum of its proper divisors (10743622).

18468218 is a wasteful number, since it uses less digits than its factorization.

18468218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261.

The product of its digits is 24576, while the sum is 38.

The square root of 18468218 is about 4297.4664629291. The cubic root of 18468218 is about 264.3270834959.

The spelling of 18468218 in words is "eighteen million, four hundred sixty-eight thousand, two hundred eighteen".