13218723907 has 2 divisors, whose sum is σ = 13218723908. Its totient is φ = 13218723906.

The previous prime is 13218723899. The next prime is 13218723923. The reversal of 13218723907 is 70932781231.

13218723907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13218723907 - 2³ = 13218723899 is a prime.

It is not a weakly prime, because it can be changed into another prime (13218723977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609361953 + 6609361954.

It is an arithmetic number, because the mean of its divisors is an integer number (6609361954).

Almost surely, 2^13218723907 is an apocalyptic number.

13218723907 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218723907 is an equidigital number, since it uses as much as digits as its factorization.

13218723907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 13218723907 in words is "thirteen billion, two hundred eighteen million, seven hundred twenty-three thousand, nine hundred seven".