18672226136 has 16 divisors (see below), whose sum is σ = 36853078200. Its totient is φ = 8844738624.

The previous prime is 18672226121. The next prime is 18672226141. The reversal of 18672226136 is 63162227681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61421645 + ... + 61421948.

Almost surely, 2^18672226136 is an apocalyptic number.

It is an amenable number.

18672226136 is a deficient number, since it is larger than the sum of its proper divisors (18180852064).

18672226136 is a wasteful number, since it uses less digits than its factorization.

18672226136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122843618 (or 122843614 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The spelling of 18672226136 in words is "eighteen billion, six hundred seventy-two million, two hundred twenty-six thousand, one hundred thirty-six".