18430317 has 6 divisors (see below), whose sum is σ = 26621582. Its totient is φ = 12286872.

The previous prime is 18430301. The next prime is 18430327. The reversal of 18430317 is 71303481.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 4435236 = 3741^2 + 2106^2 .

It is not a de Polignac number, because 18430317 - 2⁴ = 18430301 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 (18430327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1023898 + ... + 1023915.

Almost surely, 2^18430317 is an apocalyptic number.

It is an amenable number.

18430317 is a deficient number, since it is larger than the sum of its proper divisors (8191265).

18430317 is a wasteful number, since it uses less digits than its factorization.

18430317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047819 (or 2047816 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 18430317 is about 4293.0545069915. The cubic root of 18430317 is about 264.1461398180.

Adding to 18430317 its reverse (71303481), we get a palindrome (89733798).

The spelling of 18430317 in words is "eighteen million, four hundred thirty thousand, three hundred seventeen".