18263868307 has 2 divisors, whose sum is σ = 18263868308. Its totient is φ = 18263868306.

The previous prime is 18263868229. The next prime is 18263868319. The reversal of 18263868307 is 70386836281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18263868307 is a prime.

It is not a weakly prime, because it can be changed into another prime (18263868397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9131934153 + 9131934154.

It is an arithmetic number, because the mean of its divisors is an integer number (9131934154).

Almost surely, 2^18263868307 is an apocalyptic number.

18263868307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18263868307 is an equidigital number, since it uses as much as digits as its factorization.

18263868307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 18263868307 in words is "eighteen billion, two hundred sixty-three million, eight hundred sixty-eight thousand, three hundred seven".