20560825 has 6 divisors (see below), whose sum is σ = 25495454. Its totient is φ = 16448640.

The previous prime is 20560817. The next prime is 20560829. The reversal of 20560825 is 52806502.

It can be written as a sum of positive squares in 3 ways, for example, as 94249 + 20466576 = 307^2 + 4524^2 .

It is not a de Polignac number, because 20560825 - 2³ = 20560817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20560793 and 20560802.

It is not an unprimeable number, because it can be changed into a prime (20560829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 411192 + ... + 411241.

Almost surely, 2^20560825 is an apocalyptic number.

20560825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20560825 is a deficient number, since it is larger than the sum of its proper divisors (4934629).

20560825 is an equidigital number, since it uses as much as digits as its factorization.

20560825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822443 (or 822438 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20560825 is about 4534.4045915644. The cubic root of 20560825 is about 273.9555977919.

The spelling of 20560825 in words is "twenty million, five hundred sixty thousand, eight hundred twenty-five".