18545224228 has 12 divisors (see below), whose sum is σ = 32456437020. Its totient is φ = 9271956512.

The previous prime is 18545224219. The next prime is 18545224237. The reversal of 18545224228 is 82242254581.

It is an interprime number because it is at equal distance from previous prime (18545224219) and next prime (18545224237).

It can be written as a sum of positive squares in 2 ways, for example, as 8900412964 + 9644811264 = 94342^2 + 98208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97243 + ... + 215746.

It is an arithmetic number, because the mean of its divisors is an integer number (2704703085).

Almost surely, 2^18545224228 is an apocalyptic number.

It is an amenable number.

18545224228 is a deficient number, since it is larger than the sum of its proper divisors (13911212792).

18545224228 is a wasteful number, since it uses less digits than its factorization.

18545224228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327806 (or 327804 counting only the distinct ones).

The product of its digits is 409600, while the sum is 43.

The spelling of 18545224228 in words is "eighteen billion, five hundred forty-five million, two hundred twenty-four thousand, two hundred twenty-eight".