18424118 has 4 divisors (see below), whose sum is σ = 27636180. Its totient is φ = 9212058.

The previous prime is 18424111. The next prime is 18424121. The reversal of 18424118 is 81142481.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18424111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606028 + ... + 4606031.

It is an arithmetic number, because the mean of its divisors is an integer number (6909045).

Almost surely, 2^18424118 is an apocalyptic number.

18424118 is a deficient number, since it is larger than the sum of its proper divisors (9212062).

18424118 is an equidigital number, since it uses as much as digits as its factorization.

18424118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9212061.

The product of its digits is 2048, while the sum is 29.

The square root of 18424118 is about 4292.3324661540. The cubic root of 18424118 is about 264.1165214897.

Adding to 18424118 its reverse (81142481), we get a palindrome (99566599).

The spelling of 18424118 in words is "eighteen million, four hundred twenty-four thousand, one hundred eighteen".