18536889325 has 6 divisors (see below), whose sum is σ = 22985742794. Its totient is φ = 14829511440.

The previous prime is 18536889323. The next prime is 18536889359. The reversal of 18536889325 is 52398863581.

It can be written as a sum of positive squares in 3 ways, for example, as 63186601 + 18473702724 = 7949^2 + 135918^2 .

It is not a de Polignac number, because 18536889325 - 2¹ = 18536889323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18536889325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536889323) 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 5 ways as a sum of consecutive naturals, for example, 370737762 + ... + 370737811.

Almost surely, 2^18536889325 is an apocalyptic number.

It is an amenable number.

18536889325 is a deficient number, since it is larger than the sum of its proper divisors (4448853469).

18536889325 is an equidigital number, since it uses as much as digits as its factorization.

18536889325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741475583 (or 741475578 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 58.

The spelling of 18536889325 in words is "eighteen billion, five hundred thirty-six million, eight hundred eighty-nine thousand, three hundred twenty-five".