20824285025 has 6 divisors (see below), whose sum is σ = 25822113462. Its totient is φ = 16659428000.

The previous prime is 20824284989. The next prime is 20824285037. The reversal of 20824285025 is 52058242802.

It can be written as a sum of positive squares in 3 ways, for example, as 3406356496 + 17417928529 = 58364^2 + 131977^2 .

It is not a de Polignac number, because 20824285025 - 2⁸ = 20824284769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20824285025.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 416485676 + ... + 416485725.

It is an arithmetic number, because the mean of its divisors is an integer number (4303685577).

Almost surely, 2^20824285025 is an apocalyptic number.

20824285025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20824285025 is a deficient number, since it is larger than the sum of its proper divisors (4997828437).

20824285025 is an equidigital number, since it uses as much as digits as its factorization.

20824285025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832971411 (or 832971406 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 38.

The spelling of 20824285025 in words is "twenty billion, eight hundred twenty-four million, two hundred eighty-five thousand, twenty-five".