18272238256 has 20 divisors (see below), whose sum is σ = 35549367304. Its totient is φ = 9098208000.

The previous prime is 18272238247. The next prime is 18272238293. The reversal of 18272238256 is 65283227281.

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, 2365470 + ... + 2373181.

Almost surely, 2^18272238256 is an apocalyptic number.

18272238256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18272238256 is a deficient number, since it is larger than the sum of its proper divisors (17277129048).

18272238256 is a wasteful number, since it uses less digits than its factorization.

18272238256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738900 (or 4738894 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The spelling of 18272238256 in words is "eighteen billion, two hundred seventy-two million, two hundred thirty-eight thousand, two hundred fifty-six".