18107117 has 12 divisors (see below), whose sum is σ = 21579516. Its totient is φ = 15140160.

The previous prime is 18107101. The next prime is 18107119. The reversal of 18107117 is 71170181.

It can be written as a sum of positive squares in 2 ways, for example, as 3924361 + 14182756 = 1981^2 + 3766^2 .

It is not a de Polignac number, because 18107117 - 2⁴ = 18107101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18107119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2498 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (1798293).

Almost surely, 2^18107117 is an apocalyptic number.

It is an amenable number.

18107117 is a deficient number, since it is larger than the sum of its proper divisors (3472399).

18107117 is an equidigital number, since it uses as much as digits as its factorization.

18107117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9068 (or 9061 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 26.

The square root of 18107117 is about 4255.2458213363. The cubic root of 18107117 is about 262.5929744730.

Adding to 18107117 its reverse (71170181), we get a palindrome (89277298).

The spelling of 18107117 in words is "eighteen million, one hundred seven thousand, one hundred seventeen".