18945231275 has 6 divisors (see below), whose sum is σ = 23492086812. Its totient is φ = 15156185000.

The previous prime is 18945231241. The next prime is 18945231289. The reversal of 18945231275 is 57213254981.

It is a de Polignac number, because none of the positive numbers 2^k-18945231275 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 378904601 + ... + 378904650.

It is an arithmetic number, because the mean of its divisors is an integer number (3915347802).

Almost surely, 2^18945231275 is an apocalyptic number.

18945231275 is a deficient number, since it is larger than the sum of its proper divisors (4546855537).

18945231275 is an equidigital number, since it uses as much as digits as its factorization.

18945231275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757809261 (or 757809256 counting only the distinct ones).

The product of its digits is 604800, while the sum is 47.

The spelling of 18945231275 in words is "eighteen billion, nine hundred forty-five million, two hundred thirty-one thousand, two hundred seventy-five".