9920704225 has 12 divisors (see below), whose sum is σ = 12314775420. Its totient is φ = 7928110400.

The previous prime is 9920704223. The next prime is 9920704253. The reversal of 9920704225 is 5224070299.

It can be written as a sum of positive squares in 6 ways, for example, as 644702881 + 9276001344 = 25391^2 + 96312^2 .

It is not a de Polignac number, because 9920704225 - 2¹ = 9920704223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9920704223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187330 + ... + 234379.

It is an arithmetic number, because the mean of its divisors is an integer number (1026231285).

Almost surely, 2^9920704225 is an apocalyptic number.

It is an amenable number.

9920704225 is a deficient number, since it is larger than the sum of its proper divisors (2394071195).

9920704225 is a wasteful number, since it uses less digits than its factorization.

9920704225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422660 (or 422655 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 9920704225 is about 99602.7320157434. The cubic root of 9920704225 is about 2148.7249858705.

The spelling of 9920704225 in words is "nine billion, nine hundred twenty million, seven hundred four thousand, two hundred twenty-five".