18320353 has 2 divisors, whose sum is σ = 18320354. Its totient is φ = 18320352.

The previous prime is 18320333. The next prime is 18320363. The reversal of 18320353 is 35302381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 613089 = 4208^2 + 783^2 .

It is an emirp because it is prime and its reverse (35302381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18320353 - 2⁵ = 18320321 is a prime.

It is not a weakly prime, because it can be changed into another prime (18320333) 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 as a sum of consecutive naturals, namely, 9160176 + 9160177.

It is an arithmetic number, because the mean of its divisors is an integer number (9160177).

Almost surely, 2^18320353 is an apocalyptic number.

It is an amenable number.

18320353 is a deficient number, since it is larger than the sum of its proper divisors (1).

18320353 is an equidigital number, since it uses as much as digits as its factorization.

18320353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 18320353 is about 4280.2281481248. The cubic root of 18320353 is about 263.6197512070.

The spelling of 18320353 in words is "eighteen million, three hundred twenty thousand, three hundred fifty-three".