18605744226 has 20 divisors (see below), whose sum is σ = 41690649462. Its totient is φ = 6201914688.

The previous prime is 18605744203. The next prime is 18605744251. The reversal of 18605744226 is 62244750681.

18605744226 is a `hidden beast` number, since 18 + 6 + 0 + 574 + 42 + 26 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18564335001 + 41409225 = 136251^2 + 6435^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 57424975 + ... + 57425298.

Almost surely, 2^18605744226 is an apocalyptic number.

18605744226 is an abundant number, since it is smaller than the sum of its proper divisors (23084905236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18605744226 is a wasteful number, since it uses less digits than its factorization.

18605744226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114850287 (or 114850278 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 18605744226 in words is "eighteen billion, six hundred five million, seven hundred forty-four thousand, two hundred twenty-six".