18568948776 has 128 divisors (see below), whose sum is σ = 53488512000. Its totient is φ = 5262147072.

The previous prime is 18568948687. The next prime is 18568948781. The reversal of 18568948776 is 67784986581.

It is a self number, because there is not a number n which added to its sum of digits gives 18568948776.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19816980 + ... + 19817916.

It is an arithmetic number, because the mean of its divisors is an integer number (417879000).

Almost surely, 2^18568948776 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 18568948776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26744256000).

18568948776 is an abundant number, since it is smaller than the sum of its proper divisors (34919563224).

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

18568948776 is a wasteful number, since it uses less digits than its factorization.

18568948776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1787 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 69.

The spelling of 18568948776 in words is "eighteen billion, five hundred sixty-eight million, nine hundred forty-eight thousand, seven hundred seventy-six".