9921532736 has 28 divisors (see below), whose sum is σ = 19700133828. Its totient is φ = 4957719552.

The previous prime is 9921532681. The next prime is 9921532757. The reversal of 9921532736 is 6372351299.

It can be written as a sum of positive squares in 2 ways, for example, as 2878966336 + 7042566400 = 53656^2 + 83920^2 .

It is a congruent number.

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, 59270 + ... + 152826.

Almost surely, 2^9921532736 is an apocalyptic number.

It is an amenable number.

9921532736 is a deficient number, since it is larger than the sum of its proper divisors (9778601092).

9921532736 is a wasteful number, since it uses less digits than its factorization.

9921532736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95226 (or 95216 counting only the distinct ones).

The product of its digits is 612360, while the sum is 47.

The square root of 9921532736 is about 99606.8910065965. The cubic root of 9921532736 is about 2148.7847999284.

The spelling of 9921532736 in words is "nine billion, nine hundred twenty-one million, five hundred thirty-two thousand, seven hundred thirty-six".