18682117 has 2 divisors, whose sum is σ = 18682118. Its totient is φ = 18682116.

The previous prime is 18682109. The next prime is 18682121. The reversal of 18682117 is 71128681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14737921 + 3944196 = 3839^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 18682117 - 2³ = 18682109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18682127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341058 + 9341059.

It is an arithmetic number, because the mean of its divisors is an integer number (9341059).

Almost surely, 2^18682117 is an apocalyptic number.

It is an amenable number.

18682117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18682117 is an equidigital number, since it uses as much as digits as its factorization.

18682117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 18682117 is about 4322.2814577489. The cubic root of 18682117 is about 265.3436481531.

Subtracting 18682117 from its reverse (71128681), we obtain a square (52446564 = 7242²).

The spelling of 18682117 in words is "eighteen million, six hundred eighty-two thousand, one hundred seventeen".