18634118 has 4 divisors (see below), whose sum is σ = 27951180. Its totient is φ = 9317058.

The previous prime is 18634073. The next prime is 18634127. The reversal of 18634118 is 81143681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81143681 = 911 ⋅89071.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4658528 + ... + 4658531.

It is an arithmetic number, because the mean of its divisors is an integer number (6987795).

Almost surely, 2^18634118 is an apocalyptic number.

18634118 is a deficient number, since it is larger than the sum of its proper divisors (9317062).

18634118 is an equidigital number, since it uses as much as digits as its factorization.

18634118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317061.

The product of its digits is 4608, while the sum is 32.

The square root of 18634118 is about 4316.7253792661. The cubic root of 18634118 is about 265.1162086740.

Adding to 18634118 its reverse (81143681), we get a palindrome (99777799).

The spelling of 18634118 in words is "eighteen million, six hundred thirty-four thousand, one hundred eighteen".