18747836243 has 2 divisors, whose sum is σ = 18747836244. Its totient is φ = 18747836242.

The previous prime is 18747836209. The next prime is 18747836267. The reversal of 18747836243 is 34263874781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18747836243 - 2²⁸ = 18479400787 is a prime.

It is not a weakly prime, because it can be changed into another prime (18747836743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9373918121 + 9373918122.

It is an arithmetic number, because the mean of its divisors is an integer number (9373918122).

Almost surely, 2^18747836243 is an apocalyptic number.

18747836243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18747836243 is an equidigital number, since it uses as much as digits as its factorization.

18747836243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 53.

The spelling of 18747836243 in words is "eighteen billion, seven hundred forty-seven million, eight hundred thirty-six thousand, two hundred forty-three".