8917821996 has 24 divisors (see below), whose sum is σ = 20818747824. Its totient is φ = 2971107840.

The previous prime is 8917821989. The next prime is 8917822009. The reversal of 8917821996 is 6991287198.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162525 + ... + 210356.

It is an arithmetic number, because the mean of its divisors is an integer number (867447826).

Almost surely, 2^8917821996 is an apocalyptic number.

It is an amenable number.

8917821996 is an abundant number, since it is smaller than the sum of its proper divisors (11900925828).

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

8917821996 is a wasteful number, since it uses less digits than its factorization.

8917821996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374881 (or 374879 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 60.

The square root of 8917821996 is about 94434.2204711830. The cubic root of 8917821996 is about 2073.7334504059.

The spelling of 8917821996 in words is "eight billion, nine hundred seventeen million, eight hundred twenty-one thousand, nine hundred ninety-six".