18535324847243 has 2 divisors, whose sum is σ = 18535324847244. Its totient is φ = 18535324847242.

The previous prime is 18535324847197. The next prime is 18535324847261. The reversal of 18535324847243 is 34274842353581.

It is a strong prime.

It is an emirp because it is prime and its reverse (34274842353581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18535324847243 - 2²⁸ = 18535056411787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18535324847843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9267662423621 + 9267662423622.

It is an arithmetic number, because the mean of its divisors is an integer number (9267662423622).

Almost surely, 2^{18535324847243} is an apocalyptic number.

18535324847243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18535324847243 is an equidigital number, since it uses as much as digits as its factorization.

18535324847243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77414400, while the sum is 59.

The spelling of 18535324847243 in words is "eighteen trillion, five hundred thirty-five billion, three hundred twenty-four million, eight hundred forty-seven thousand, two hundred forty-three".