18230917 has 2 divisors, whose sum is σ = 18230918. Its totient is φ = 18230916.

The previous prime is 18230911. The next prime is 18230923. The reversal of 18230917 is 71903281.

It is a balanced prime because it is at equal distance from previous prime (18230911) and next prime (18230923).

It can be written as a sum of positive squares in only one way, i.e., 14032516 + 4198401 = 3746^2 + 2049^2 .

It is an emirp because it is prime and its reverse (71903281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18230917 - 2¹⁵ = 18198149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18230911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115458 + 9115459.

It is an arithmetic number, because the mean of its divisors is an integer number (9115459).

Almost surely, 2^18230917 is an apocalyptic number.

It is an amenable number.

18230917 is a deficient number, since it is larger than the sum of its proper divisors (1).

18230917 is an equidigital number, since it uses as much as digits as its factorization.

18230917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18230917 is about 4269.7677922810. The cubic root of 18230917 is about 263.1900730497.

The spelling of 18230917 in words is "eighteen million, two hundred thirty thousand, nine hundred seventeen".