18563924713 has 2 divisors, whose sum is σ = 18563924714. Its totient is φ = 18563924712.

The previous prime is 18563924689. The next prime is 18563924777. The reversal of 18563924713 is 31742936581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13959895104 + 4604029609 = 118152^2 + 67853^2 .

It is a cyclic number.

It is not a de Polignac number, because 18563924713 - 2¹³ = 18563916521 is a prime.

It is a super-3 number, since 3×18563924713³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18563924513) 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, 9281962356 + 9281962357.

It is an arithmetic number, because the mean of its divisors is an integer number (9281962357).

Almost surely, 2^18563924713 is an apocalyptic number.

It is an amenable number.

18563924713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18563924713 is an equidigital number, since it uses as much as digits as its factorization.

18563924713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The spelling of 18563924713 in words is "eighteen billion, five hundred sixty-three million, nine hundred twenty-four thousand, seven hundred thirteen".