9821078994 has 32 divisors (see below), whose sum is σ = 20030976000. Its totient is φ = 3209200784.

The previous prime is 9821078983. The next prime is 9821079001. The reversal of 9821078994 is 4998701289.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88447 + ... + 165725.

It is an arithmetic number, because the mean of its divisors is an integer number (625968000).

Almost surely, 2^9821078994 is an apocalyptic number.

9821078994 is an abundant number, since it is smaller than the sum of its proper divisors (10209897006).

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

9821078994 is a wasteful number, since it uses less digits than its factorization.

9821078994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77702.

The product of its (nonzero) digits is 2612736, while the sum is 57.

The square root of 9821078994 is about 99101.3571753687. The cubic root of 9821078994 is about 2141.5081657691.

The spelling of 9821078994 in words is "nine billion, eight hundred twenty-one million, seventy-eight thousand, nine hundred ninety-four".