20304847225 has 36 divisors (see below), whose sum is σ = 27778479876. Its totient is φ = 14711274240.

The previous prime is 20304847187. The next prime is 20304847231. The reversal of 20304847225 is 52274840302.

It can be written as a sum of positive squares in 18 ways, for example, as 20275481664 + 29365561 = 142392^2 + 5419^2 .

It is not a de Polignac number, because 20304847225 - 2⁹ = 20304846713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 178587 + ... + 269263.

It is an arithmetic number, because the mean of its divisors is an integer number (771624441).

Almost surely, 2^20304847225 is an apocalyptic number.

20304847225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20304847225 is a deficient number, since it is larger than the sum of its proper divisors (7473632651).

20304847225 is a wasteful number, since it uses less digits than its factorization.

20304847225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90766 (or 90748 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 20304847225 in words is "twenty billion, three hundred four million, eight hundred forty-seven thousand, two hundred twenty-five".