18381359 has 2 divisors, whose sum is σ = 18381360. Its totient is φ = 18381358.

The previous prime is 18381353. The next prime is 18381361. The reversal of 18381359 is 95318381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18381359 - 2⁴ = 18381343 is a prime.

Together with 18381361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18381353) 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, 9190679 + 9190680.

It is an arithmetic number, because the mean of its divisors is an integer number (9190680).

Almost surely, 2^18381359 is an apocalyptic number.

18381359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18381359 is an equidigital number, since it uses as much as digits as its factorization.

18381359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 18381359 is about 4287.3487145321. The cubic root of 18381359 is about 263.9120412132.

The spelling of 18381359 in words is "eighteen million, three hundred eighty-one thousand, three hundred fifty-nine".