18131693589 has 48 divisors (see below), whose sum is σ = 27950866944. Its totient is φ = 11738649600.

The previous prime is 18131693581. The next prime is 18131693639. The reversal of 18131693589 is 98539613181.

It is not a de Polignac number, because 18131693589 - 2³ = 18131693581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18131693581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2217669 + ... + 2225829.

It is an arithmetic number, because the mean of its divisors is an integer number (582309728).

Almost surely, 2^18131693589 is an apocalyptic number.

It is an amenable number.

18131693589 is a deficient number, since it is larger than the sum of its proper divisors (9819173355).

18131693589 is an equidigital number, since it uses as much as digits as its factorization.

18131693589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440 (or 8428 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 18131693589 in words is "eighteen billion, one hundred thirty-one million, six hundred ninety-three thousand, five hundred eighty-nine".