18320337547 has 2 divisors, whose sum is σ = 18320337548. Its totient is φ = 18320337546.

The previous prime is 18320337527. The next prime is 18320337551. The reversal of 18320337547 is 74573302381.

It is a strong prime.

It is an emirp because it is prime and its reverse (74573302381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18320337547 is a prime.

It is not a weakly prime, because it can be changed into another prime (18320337527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9160168773 + 9160168774.

It is an arithmetic number, because the mean of its divisors is an integer number (9160168774).

Almost surely, 2^18320337547 is an apocalyptic number.

18320337547 is a deficient number, since it is larger than the sum of its proper divisors (1).

18320337547 is an equidigital number, since it uses as much as digits as its factorization.

18320337547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 18320337547 in words is "eighteen billion, three hundred twenty million, three hundred thirty-seven thousand, five hundred forty-seven".