9920680812 has 72 divisors (see below), whose sum is σ = 28706496000. Its totient is φ = 2829856608.

The previous prime is 9920680807. The next prime is 9920680813. The reversal of 9920680812 is 2180860299.

9920680812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9920680813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124189 + ... + 187787.

Almost surely, 2^9920680812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9920680812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14353248000).

9920680812 is an abundant number, since it is smaller than the sum of its proper divisors (18785815188).

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

9920680812 is a wasteful number, since it uses less digits than its factorization.

9920680812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64235 (or 64230 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 9920680812 is about 99602.6144837574. The cubic root of 9920680812 is about 2148.7232955289.

The spelling of 9920680812 in words is "nine billion, nine hundred twenty million, six hundred eighty thousand, eight hundred twelve".