20385610726825 has 12 divisors (see below), whose sum is σ = 25293412728220. Its totient is φ = 16298646370560.

The previous prime is 20385610726781. The next prime is 20385610726829. The reversal of 20385610726825 is 52862701658302.

It can be written as a sum of positive squares in 6 ways, for example, as 2824658371584 + 17560952355241 = 1680672^2 + 4190579^2 .

It is not a de Polignac number, because 20385610726825 - 2³¹ = 20383463243177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385610726829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246013020 + ... + 246095869.

Almost surely, 2^{20385610726825} is an apocalyptic number.

20385610726825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20385610726825 is a deficient number, since it is larger than the sum of its proper divisors (4907802001395).

20385610726825 is a wasteful number, since it uses less digits than its factorization.

20385610726825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492110556 (or 492110551 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 20385610726825 in words is "twenty trillion, three hundred eighty-five billion, six hundred ten million, seven hundred twenty-six thousand, eight hundred twenty-five".