18442208 has 12 divisors (see below), whose sum is σ = 36308160. Its totient is φ = 9221088.

The previous prime is 18442201. The next prime is 18442213. The reversal of 18442208 is 80224481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288128 + ... + 288191.

It is an arithmetic number, because the mean of its divisors is an integer number (3025680).

Almost surely, 2^18442208 is an apocalyptic number.

It is an amenable number.

18442208 is a deficient number, since it is larger than the sum of its proper divisors (17865952).

18442208 is an equidigital number, since it uses as much as digits as its factorization.

18442208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576329 (or 576321 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 18442208 is about 4294.4391950521. The cubic root of 18442208 is about 264.2029354858.

Adding to 18442208 its reverse (80224481), we get a palindrome (98666689).

The spelling of 18442208 in words is "eighteen million, four hundred forty-two thousand, two hundred eight".