18424117 has 4 divisors (see below), whose sum is σ = 18606636. Its totient is φ = 18241600.

The previous prime is 18424111. The next prime is 18424121. The reversal of 18424117 is 71142481.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8444836 + 9979281 = 2906^2 + 3159^2 .

It is a cyclic number.

It is not a de Polignac number, because 18424117 - 2¹⁵ = 18391349 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 91108 + ... + 91309.

It is an arithmetic number, because the mean of its divisors is an integer number (4651659).

Almost surely, 2^18424117 is an apocalyptic number.

It is an amenable number.

18424117 is a deficient number, since it is larger than the sum of its proper divisors (182519).

18424117 is a wasteful number, since it uses less digits than its factorization.

18424117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182518.

The product of its digits is 1792, while the sum is 28.

The square root of 18424117 is about 4292.3323496673. The cubic root of 18424117 is about 264.1165167112.

Adding to 18424117 its reverse (71142481), we get a palindrome (89566598).

The spelling of 18424117 in words is "eighteen million, four hundred twenty-four thousand, one hundred seventeen".