18218248 has 16 divisors (see below), whose sum is σ = 34480080. Its totient is φ = 9023568.

The previous prime is 18218209. The next prime is 18218257. The reversal of 18218248 is 84281281.

It is a nude number because it is divisible by every one of its digits.

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, 9786 + ... + 11497.

It is an arithmetic number, because the mean of its divisors is an integer number (2155005).

Almost surely, 2^18218248 is an apocalyptic number.

It is an amenable number.

18218248 is a deficient number, since it is larger than the sum of its proper divisors (16261832).

18218248 is a wasteful number, since it uses less digits than its factorization.

18218248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21396 (or 21392 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 18218248 is about 4268.2839643117. The cubic root of 18218248 is about 263.1290937126.

The spelling of 18218248 in words is "eighteen million, two hundred eighteen thousand, two hundred forty-eight".