18102117 has 16 divisors (see below), whose sum is σ = 27717120. Its totient is φ = 10393200.

The previous prime is 18102113. The next prime is 18102121. The reversal of 18102117 is 71120181.

It is an interprime number because it is at equal distance from previous prime (18102113) and next prime (18102121).

It is not a de Polignac number, because 18102117 - 2² = 18102113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18102093 and 18102102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18102113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13809 + ... + 15062.

It is an arithmetic number, because the mean of its divisors is an integer number (1732320).

Almost surely, 2^18102117 is an apocalyptic number.

It is an amenable number.

18102117 is a deficient number, since it is larger than the sum of its proper divisors (9615003).

18102117 is a wasteful number, since it uses less digits than its factorization.

18102117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28904.

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 18102117 is about 4254.6582706488. The cubic root of 18102117 is about 262.5688019199.

Adding to 18102117 its reverse (71120181), we get a palindrome (89222298).

The spelling of 18102117 in words is "eighteen million, one hundred two thousand, one hundred seventeen".