18306874189 has 2 divisors, whose sum is σ = 18306874190. Its totient is φ = 18306874188.

The previous prime is 18306874147. The next prime is 18306874217. The reversal of 18306874189 is 98147860381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10050062500 + 8256811689 = 100250^2 + 90867^2 .

It is a cyclic number.

It is not a de Polignac number, because 18306874189 - 2³³ = 9716939597 is a prime.

It is a super-3 number, since 3×18306874189³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18306874589) 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, 9153437094 + 9153437095.

It is an arithmetic number, because the mean of its divisors is an integer number (9153437095).

Almost surely, 2^18306874189 is an apocalyptic number.

It is an amenable number.

18306874189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18306874189 is an equidigital number, since it uses as much as digits as its factorization.

18306874189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 18306874189 in words is "eighteen billion, three hundred six million, eight hundred seventy-four thousand, one hundred eighty-nine".