9721838052 has 36 divisors (see below), whose sum is σ = 25484820816. Its totient is φ = 3240612360.

The previous prime is 9721838047. The next prime is 9721838069. The reversal of 9721838052 is 2508381279.

It is a happy number.

9721838052 is a `hidden beast` number, since 9 + 7 + 218 + 380 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 9721837989 and 9721838007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4999974 + ... + 5001917.

Almost surely, 2^9721838052 is an apocalyptic number.

It is an amenable number.

9721838052 is an abundant number, since it is smaller than the sum of its proper divisors (15762982764).

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

9721838052 is a wasteful number, since it uses less digits than its factorization.

9721838052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001910 (or 10001896 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 9721838052 is about 98599.3816004948. The cubic root of 9721838052 is about 2134.2704959204.

The spelling of 9721838052 in words is "nine billion, seven hundred twenty-one million, eight hundred thirty-eight thousand, fifty-two".