9921363968 has 38 divisors (see below), whose sum is σ = 19843214376. Its totient is φ = 4960550912.

The previous prime is 9921363943. The next prime is 9921364003. The reversal of 9921363968 is 8693631299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243221 + ... + 281067.

It is an arithmetic number, because the mean of its divisors is an integer number (522189852).

Almost surely, 2^9921363968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9921363968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9921607188).

9921363968 is an abundant number, since it is smaller than the sum of its proper divisors (9921850408).

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

9921363968 is an frugal number, since it uses more digits than its factorization.

9921363968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37883 (or 37849 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 56.

The square root of 9921363968 is about 99606.0438326912. The cubic root of 9921363968 is about 2148.7726160526.

The spelling of 9921363968 in words is "nine billion, nine hundred twenty-one million, three hundred sixty-three thousand, nine hundred sixty-eight".