18831164389 has 2 divisors, whose sum is σ = 18831164390. Its totient is φ = 18831164388.

The previous prime is 18831164377. The next prime is 18831164483. The reversal of 18831164389 is 98346113881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12989160900 + 5842003489 = 113970^2 + 76433^2 .

It is an emirp because it is prime and its reverse (98346113881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18831164389 - 2¹¹ = 18831162341 is a prime.

It is a super-3 number, since 3×18831164389³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18831164329) 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, 9415582194 + 9415582195.

It is an arithmetic number, because the mean of its divisors is an integer number (9415582195).

Almost surely, 2^18831164389 is an apocalyptic number.

It is an amenable number.

18831164389 is a deficient number, since it is larger than the sum of its proper divisors (1).

18831164389 is an equidigital number, since it uses as much as digits as its factorization.

18831164389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 52.

The spelling of 18831164389 in words is "eighteen billion, eight hundred thirty-one million, one hundred sixty-four thousand, three hundred eighty-nine".