9999921032 has 16 divisors (see below), whose sum is σ = 19256605260. Its totient is φ = 4864826304.

The previous prime is 9999921031. The next prime is 9999921037. The reversal of 9999921032 is 2301299999.

It can be written as a sum of positive squares in 2 ways, for example, as 9630281956 + 369639076 = 98134^2 + 19226^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9999921031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16891463 + ... + 16892054.

Almost surely, 2^9999921032 is an apocalyptic number.

It is an amenable number.

9999921032 is a deficient number, since it is larger than the sum of its proper divisors (9256684228).

9999921032 is a wasteful number, since it uses less digits than its factorization.

9999921032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33783560 (or 33783556 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 53.

The square root of 9999921032 is about 99999.6051592205. The cubic root of 9999921032 is about 2154.4290189703.

The spelling of 9999921032 in words is "nine billion, nine hundred ninety-nine million, nine hundred twenty-one thousand, thirty-two".