18040522472 has 48 divisors (see below), whose sum is σ = 39649072320. Its totient is φ = 7672610400.

The previous prime is 18040522421. The next prime is 18040522481. The reversal of 18040522472 is 27422504081.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124304 + ... + 227007.

It is an arithmetic number, because the mean of its divisors is an integer number (826022340).

Almost surely, 2^18040522472 is an apocalyptic number.

It is an amenable number.

18040522472 is an abundant number, since it is smaller than the sum of its proper divisors (21608549848).

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

18040522472 is a wasteful number, since it uses less digits than its factorization.

18040522472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351462 (or 351451 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 18040522472 in words is "eighteen billion, forty million, five hundred twenty-two thousand, four hundred seventy-two".