18273844422 has 12 divisors (see below), whose sum is σ = 39593329620. Its totient is φ = 6091281468.

The previous prime is 18273844403. The next prime is 18273844427. The reversal of 18273844422 is 22444837281.

18273844422 is a `hidden beast` number, since 1 + 82 + 73 + 84 + 4 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18273844427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 507606772 + ... + 507606807.

It is an arithmetic number, because the mean of its divisors is an integer number (3299444135).

Almost surely, 2^18273844422 is an apocalyptic number.

18273844422 is an abundant number, since it is smaller than the sum of its proper divisors (21319485198).

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

18273844422 is a wasteful number, since it uses less digits than its factorization.

18273844422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015213587 (or 1015213584 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The spelling of 18273844422 in words is "eighteen billion, two hundred seventy-three million, eight hundred forty-four thousand, four hundred twenty-two".