9920940750 has 640 divisors, whose sum is σ = 35227146240. Its totient is φ = 2030054400.

The previous prime is 9920940703. The next prime is 9920940751. The reversal of 9920940750 is 570490299.

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

It is a junction number, because it is equal to n+sod(n) for n = 9920940696 and 9920940705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920940751) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 55424161 + ... + 55424339.

It is an arithmetic number, because the mean of its divisors is an integer number (55042416).

Almost surely, 2^9920940750 is an apocalyptic number.

9920940750 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9920940750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17613573120).

9920940750 is an abundant number, since it is smaller than the sum of its proper divisors (25306205490).

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

9920940750 is a wasteful number, since it uses less digits than its factorization.

9920940750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 9920940750 is about 99603.9193505958. The cubic root of 9920940750 is about 2148.7420620487.

The spelling of 9920940750 in words is "nine billion, nine hundred twenty million, nine hundred forty thousand, seven hundred fifty".