18773585796 has 72 divisors (see below), whose sum is σ = 51179761920. Its totient is φ = 5340420288.

The previous prime is 18773585777. The next prime is 18773585837. The reversal of 18773585796 is 69758537781.

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, 64941 + ... + 204363.

Almost surely, 2^18773585796 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 18773585796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25589880960).

18773585796 is an abundant number, since it is smaller than the sum of its proper divisors (32406176124).

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

18773585796 is a wasteful number, since it uses less digits than its factorization.

18773585796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139673 (or 139664 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 66.

The spelling of 18773585796 in words is "eighteen billion, seven hundred seventy-three million, five hundred eighty-five thousand, seven hundred ninety-six".