18929342813 has 2 divisors, whose sum is σ = 18929342814. Its totient is φ = 18929342812.

The previous prime is 18929342777. The next prime is 18929342833. The reversal of 18929342813 is 31824392981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15588271609 + 3341071204 = 124853^2 + 57802^2 .

It is a cyclic number.

It is not a de Polignac number, because 18929342813 - 2⁸ = 18929342557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18929342833) 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, 9464671406 + 9464671407.

It is an arithmetic number, because the mean of its divisors is an integer number (9464671407).

Almost surely, 2^18929342813 is an apocalyptic number.

It is an amenable number.

18929342813 is a deficient number, since it is larger than the sum of its proper divisors (1).

18929342813 is an equidigital number, since it uses as much as digits as its factorization.

18929342813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The spelling of 18929342813 in words is "eighteen billion, nine hundred twenty-nine million, three hundred forty-two thousand, eight hundred thirteen".