18453118 has 4 divisors (see below), whose sum is σ = 27679680. Its totient is φ = 9226558.

The previous prime is 18453103. The next prime is 18453151. The reversal of 18453118 is 81135481.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18453118.

It is a congruent 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 as a sum of consecutive naturals, namely, 4613278 + ... + 4613281.

It is an arithmetic number, because the mean of its divisors is an integer number (6919920).

Almost surely, 2^18453118 is an apocalyptic number.

18453118 is a deficient number, since it is larger than the sum of its proper divisors (9226562).

18453118 is an equidigital number, since it uses as much as digits as its factorization.

18453118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226561.

The product of its digits is 3840, while the sum is 31.

The square root of 18453118 is about 4295.7092545935. The cubic root of 18453118 is about 264.2550240755.

Adding to 18453118 its reverse (81135481), we get a palindrome (99588599).

The spelling of 18453118 in words is "eighteen million, four hundred fifty-three thousand, one hundred eighteen".