9305720920 has 32 divisors (see below), whose sum is σ = 21332931120. Its totient is φ = 3652055680.

The previous prime is 9305720909. The next prime is 9305720929. The reversal of 9305720920 is 290275039.

It is a self number, because there is not a number n which added to its sum of digits gives 9305720920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9305720929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2192626 + ... + 2196865.

Almost surely, 2^9305720920 is an apocalyptic number.

It is an amenable number.

9305720920 is an abundant number, since it is smaller than the sum of its proper divisors (12027210200).

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

9305720920 is a wasteful number, since it uses less digits than its factorization.

9305720920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389555 (or 4389551 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 9305720920 is about 96466.1646381777. The cubic root of 9305720920 is about 2103.3748395652.

Adding to 9305720920 its reverse (290275039), we get a palindrome (9595995959).

The spelling of 9305720920 in words is "nine billion, three hundred five million, seven hundred twenty thousand, nine hundred twenty".