9384821191920 has 80 divisors (see below), whose sum is σ = 29098320400800. Its totient is φ = 2502156644352.

The previous prime is 9384821191883. The next prime is 9384821191927. The reversal of 9384821191920 is 291911284839.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9384821191927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309245 + ... + 4909404.

It is an arithmetic number, because the mean of its divisors is an integer number (363729005010).

Almost surely, 2^{9384821191920} is an apocalyptic number.

It is an amenable number.

9384821191920 is an abundant number, since it is smaller than the sum of its proper divisors (19713499208880).

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

9384821191920 is a wasteful number, since it uses less digits than its factorization.

9384821191920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7224082 (or 7224076 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 57.

The spelling of 9384821191920 in words is "nine trillion, three hundred eighty-four billion, eight hundred twenty-one million, one hundred ninety-one thousand, nine hundred twenty".