18512259224 has 16 divisors (see below), whose sum is σ = 34787799000. Its totient is φ = 9235512832.

The previous prime is 18512259221. The next prime is 18512259307. The reversal of 18512259224 is 42295221581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512259221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573282 + ... + 2580465.

Almost surely, 2^18512259224 is an apocalyptic number.

It is an amenable number.

18512259224 is a deficient number, since it is larger than the sum of its proper divisors (16275539776).

18512259224 is a wasteful number, since it uses less digits than its factorization.

18512259224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154202 (or 5154198 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The spelling of 18512259224 in words is "eighteen billion, five hundred twelve million, two hundred fifty-nine thousand, two hundred twenty-four".