9318319920 has 320 divisors, whose sum is σ = 39504138240. Its totient is φ = 1966021632.

The previous prime is 9318319919. The next prime is 9318319931. The reversal of 9318319920 is 299138139.

It is a happy number.

It is a super-2 number, since 2×9318319920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 172857 + ... + 220263.

It is an arithmetic number, because the mean of its divisors is an integer number (123450432).

Almost surely, 2^9318319920 is an apocalyptic number.

9318319920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9318319920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19752069120).

9318319920 is an abundant number, since it is smaller than the sum of its proper divisors (30185818320).

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

9318319920 is a wasteful number, since it uses less digits than its factorization.

9318319920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47449 (or 47437 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 9318319920 is about 96531.4452393623. The cubic root of 9318319920 is about 2104.3236633835.

The spelling of 9318319920 in words is "nine billion, three hundred eighteen million, three hundred nineteen thousand, nine hundred twenty".