20572525 has 6 divisors (see below), whose sum is σ = 25509962. Its totient is φ = 16458000.

The previous prime is 20572523. The next prime is 20572537. The reversal of 20572525 is 52527502.

It can be written as a sum of positive squares in 3 ways, for example, as 956484 + 19616041 = 978^2 + 4429^2 .

It is not a de Polignac number, because 20572525 - 2¹ = 20572523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20572493 and 20572502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572523) 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, 411426 + ... + 411475.

Almost surely, 2^20572525 is an apocalyptic number.

20572525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20572525 is a deficient number, since it is larger than the sum of its proper divisors (4937437).

20572525 is an equidigital number, since it uses as much as digits as its factorization.

20572525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822911 (or 822906 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 20572525 is about 4535.6945443890. The cubic root of 20572525 is about 274.0075521388.

The spelling of 20572525 in words is "twenty million, five hundred seventy-two thousand, five hundred twenty-five".