18328523 has 2 divisors, whose sum is σ = 18328524. Its totient is φ = 18328522.

The previous prime is 18328511. The next prime is 18328537. The reversal of 18328523 is 32582381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18328523 - 2⁸ = 18328267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18328523.

It is not a weakly prime, because it can be changed into another prime (18328573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9164261 + 9164262.

It is an arithmetic number, because the mean of its divisors is an integer number (9164262).

Almost surely, 2^18328523 is an apocalyptic number.

18328523 is a deficient number, since it is larger than the sum of its proper divisors (1).

18328523 is an equidigital number, since it uses as much as digits as its factorization.

18328523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 18328523 is about 4281.1824301237. The cubic root of 18328523 is about 263.6589326443.

The spelling of 18328523 in words is "eighteen million, three hundred twenty-eight thousand, five hundred twenty-three".