18480418 has 16 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 8376400.

The previous prime is 18480401. The next prime is 18480421. The reversal of 18480418 is 81408481.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8508 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (1895400).

Almost surely, 2^18480418 is an apocalyptic number.

18480418 is a deficient number, since it is larger than the sum of its proper divisors (11845982).

18480418 is a wasteful number, since it uses less digits than its factorization.

18480418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393.

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

The square root of 18480418 is about 4298.8856695660. The cubic root of 18480418 is about 264.3852750078.

Adding to 18480418 its reverse (81408481), we get a palindrome (99888899).

The spelling of 18480418 in words is "eighteen million, four hundred eighty thousand, four hundred eighteen".