18610117 has 2 divisors, whose sum is σ = 18610118. Its totient is φ = 18610116.

The previous prime is 18610103. The next prime is 18610127. The reversal of 18610117 is 71101681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17690436 + 919681 = 4206^2 + 959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18610117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18610091 and 18610100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18610127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9305058 + 9305059.

It is an arithmetic number, because the mean of its divisors is an integer number (9305059).

Almost surely, 2^18610117 is an apocalyptic number.

It is an amenable number.

18610117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18610117 is an equidigital number, since it uses as much as digits as its factorization.

18610117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 18610117 is about 4313.9444827211. The cubic root of 18610117 is about 265.0023353301.

Adding to 18610117 its reverse (71101681), we get a palindrome (89711798).

The spelling of 18610117 in words is "eighteen million, six hundred ten thousand, one hundred seventeen".