9989634020 has 12 divisors (see below), whose sum is σ = 20978231484. Its totient is φ = 3995853600.

The previous prime is 9989634013. The next prime is 9989634049. The reversal of 9989634020 is 204369899.

It can be written as a sum of positive squares in 2 ways, for example, as 5699646016 + 4289988004 = 75496^2 + 65498^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 9989634020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249740831 + ... + 249740870.

It is an arithmetic number, because the mean of its divisors is an integer number (1748185957).

Almost surely, 2^9989634020 is an apocalyptic number.

It is an amenable number.

9989634020 is an abundant number, since it is smaller than the sum of its proper divisors (10988597464).

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

9989634020 is a wasteful number, since it uses less digits than its factorization.

9989634020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499481710 (or 499481708 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 9989634020 is about 99948.1566613412. The cubic root of 9989634020 is about 2153.6900050960.

The spelling of 9989634020 in words is "nine billion, nine hundred eighty-nine million, six hundred thirty-four thousand, twenty".