18468531582 has 48 divisors (see below), whose sum is σ = 40645234560. Its totient is φ = 5578577136.

The previous prime is 18468531577. The next prime is 18468531617. The reversal of 18468531582 is 28513586481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92818 + ... + 213429.

It is an arithmetic number, because the mean of its divisors is an integer number (846775720).

Almost surely, 2^18468531582 is an apocalyptic number.

18468531582 is an abundant number, since it is smaller than the sum of its proper divisors (22176702978).

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

18468531582 is a wasteful number, since it uses less digits than its factorization.

18468531582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306317 (or 306294 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 51.

The spelling of 18468531582 in words is "eighteen billion, four hundred sixty-eight million, five hundred thirty-one thousand, five hundred eighty-two".