18562884864 has 72 divisors (see below), whose sum is σ = 49857820320. Its totient is φ = 6130833408.

The previous prime is 18562884829. The next prime is 18562884937. The reversal of 18562884864 is 46848826581.

It is a junction number, because it is equal to n+sod(n) for n = 18562884798 and 18562884807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27162 + ... + 194585.

Almost surely, 2^18562884864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18562884864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24928910160).

18562884864 is an abundant number, since it is smaller than the sum of its proper divisors (31294935456).

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

18562884864 is a wasteful number, since it uses less digits than its factorization.

18562884864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221875 (or 221861 counting only the distinct ones).

The product of its digits is 23592960, while the sum is 60.

The spelling of 18562884864 in words is "eighteen billion, five hundred sixty-two million, eight hundred eighty-four thousand, eight hundred sixty-four".