9384821994 has 32 divisors (see below), whose sum is σ = 18841919040. Its totient is φ = 3116247552.

The previous prime is 9384821993. The next prime is 9384822017. The reversal of 9384821994 is 4991284839.

It is a super-2 number, since 2×9384821994² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9384821993) 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, 3088644 + ... + 3091680.

It is an arithmetic number, because the mean of its divisors is an integer number (588809970).

Almost surely, 2^9384821994 is an apocalyptic number.

9384821994 is an abundant number, since it is smaller than the sum of its proper divisors (9457097046).

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

9384821994 is a wasteful number, since it uses less digits than its factorization.

9384821994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854.

The product of its digits is 4478976, while the sum is 57.

The square root of 9384821994 is about 96875.2909363373. The cubic root of 9384821994 is about 2109.3177787390.

The spelling of 9384821994 in words is "nine billion, three hundred eighty-four million, eight hundred twenty-one thousand, nine hundred ninety-four".