20563204102625 has 8 divisors (see below), whose sum is σ = 25662878720232. Its totient is φ = 16450563282000.

The previous prime is 20563204102621. The next prime is 20563204102633. The reversal of 20563204102625 is 52620140236502.

It can be written as a sum of positive squares in 4 ways, for example, as 570224337424 + 19992979765201 = 755132^2 + 4471351^2 .

It is not a de Polignac number, because 20563204102625 - 2² = 20563204102621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20563204102621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82252816286 + ... + 82252816535.

It is an arithmetic number, because the mean of its divisors is an integer number (3207859840029).

Almost surely, 2^{20563204102625} is an apocalyptic number.

20563204102625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20563204102625 is a deficient number, since it is larger than the sum of its proper divisors (5099674617607).

20563204102625 is an equidigital number, since it uses as much as digits as its factorization.

20563204102625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164505632836 (or 164505632826 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20563204102625 in words is "twenty trillion, five hundred sixty-three billion, two hundred four million, one hundred two thousand, six hundred twenty-five".