18338505503519 has 2 divisors, whose sum is σ = 18338505503520. Its totient is φ = 18338505503518.

The previous prime is 18338505503459. The next prime is 18338505503533. The reversal of 18338505503519 is 91530550583381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18338505503519 - 2³⁶ = 18269786026783 is a prime.

It is a super-2 number, since 2×18338505503519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18338505503419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169252751759 + 9169252751760.

It is an arithmetic number, because the mean of its divisors is an integer number (9169252751760).

Almost surely, 2^{18338505503519} is an apocalyptic number.

18338505503519 is a deficient number, since it is larger than the sum of its proper divisors (1).

18338505503519 is an equidigital number, since it uses as much as digits as its factorization.

18338505503519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720000, while the sum is 56.

The spelling of 18338505503519 in words is "eighteen trillion, three hundred thirty-eight billion, five hundred five million, five hundred three thousand, five hundred nineteen".