18791202847 has 2 divisors, whose sum is σ = 18791202848. Its totient is φ = 18791202846.

The previous prime is 18791202827. The next prime is 18791202853. The reversal of 18791202847 is 74820219781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18791202847 - 2¹⁹ = 18790678559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18791202847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18791202827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9395601423 + 9395601424.

It is an arithmetic number, because the mean of its divisors is an integer number (9395601424).

Almost surely, 2^18791202847 is an apocalyptic number.

18791202847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18791202847 is an equidigital number, since it uses as much as digits as its factorization.

18791202847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 18791202847 in words is "eighteen billion, seven hundred ninety-one million, two hundred two thousand, eight hundred forty-seven".