20575025 has 6 divisors (see below), whose sum is σ = 25513062. Its totient is φ = 16460000.

The previous prime is 20574973. The next prime is 20575031. The reversal of 20575025 is 52057502.

It can be written as a sum of positive squares in 3 ways, for example, as 153664 + 20421361 = 392^2 + 4519^2 .

It is not a de Polignac number, because 20575025 - 2¹² = 20570929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20574985 and 20575003.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 411476 + ... + 411525.

It is an arithmetic number, because the mean of its divisors is an integer number (4252177).

Almost surely, 2^20575025 is an apocalyptic number.

20575025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20575025 is a deficient number, since it is larger than the sum of its proper divisors (4938037).

20575025 is an equidigital number, since it uses as much as digits as its factorization.

20575025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823011 (or 823006 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 20575025 is about 4535.9701277676. The cubic root of 20575025 is about 274.0186509406.

The spelling of 20575025 in words is "twenty million, five hundred seventy-five thousand, twenty-five".