18028474913 has 2 divisors, whose sum is σ = 18028474914. Its totient is φ = 18028474912.

The previous prime is 18028474879. The next prime is 18028474939. The reversal of 18028474913 is 31947482081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17291461009 + 737013904 = 131497^2 + 27148^2 .

It is a cyclic number.

It is not a de Polignac number, because 18028474913 - 2²⁰ = 18027426337 is a prime.

It is not a weakly prime, because it can be changed into another prime (18028474943) 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, 9014237456 + 9014237457.

It is an arithmetic number, because the mean of its divisors is an integer number (9014237457).

Almost surely, 2^18028474913 is an apocalyptic number.

It is an amenable number.

18028474913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028474913 is an equidigital number, since it uses as much as digits as its factorization.

18028474913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 18028474913 in words is "eighteen billion, twenty-eight million, four hundred seventy-four thousand, nine hundred thirteen".