18338901833947 has 2 divisors, whose sum is σ = 18338901833948. Its totient is φ = 18338901833946.

The previous prime is 18338901833927. The next prime is 18338901833999. The reversal of 18338901833947 is 74933810983381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18338901833947 is a prime.

It is not a weakly prime, because it can be changed into another prime (18338901833927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169450916973 + 9169450916974.

It is an arithmetic number, because the mean of its divisors is an integer number (9169450916974).

Almost surely, 2^{18338901833947} is an apocalyptic number.

18338901833947 is a deficient number, since it is larger than the sum of its proper divisors (1).

18338901833947 is an equidigital number, since it uses as much as digits as its factorization.

18338901833947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 18338901833947 in words is "eighteen trillion, three hundred thirty-eight billion, nine hundred one million, eight hundred thirty-three thousand, nine hundred forty-seven".