18856985075713 has 4 divisors (see below), whose sum is σ = 18863362144980. Its totient is φ = 18850608006448.

The previous prime is 18856985075711. The next prime is 18856985075777. The reversal of 18856985075713 is 31757058965881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7285340544769 + 11571644530944 = 2699137^2 + 3401712^2 .

It is a cyclic number.

It is not a de Polignac number, because 18856985075713 - 2¹ = 18856985075711 is a prime.

It is a super-2 number, since 2×18856985075713² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18856985075711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3188530198 + ... + 3188536111.

It is an arithmetic number, because the mean of its divisors is an integer number (4715840536245).

Almost surely, 2^{18856985075713} is an apocalyptic number.

It is an amenable number.

18856985075713 is a deficient number, since it is larger than the sum of its proper divisors (6377069267).

18856985075713 is an equidigital number, since it uses as much as digits as its factorization.

18856985075713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377069266.

The product of its (nonzero) digits is 508032000, while the sum is 73.

The spelling of 18856985075713 in words is "eighteen trillion, eight hundred fifty-six billion, nine hundred eighty-five million, seventy-five thousand, seven hundred thirteen".