20572325 has 6 divisors (see below), whose sum is σ = 25509714. Its totient is φ = 16457840.

The previous prime is 20572319. The next prime is 20572337. The reversal of 20572325 is 52327502.

It can be written as a sum of positive squares in 3 ways, for example, as 519841 + 20052484 = 721^2 + 4478^2 .

It is not a de Polignac number, because 20572325 - 2⁴ = 20572309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20572294 and 20572303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 411422 + ... + 411471.

It is an arithmetic number, because the mean of its divisors is an integer number (4251619).

Almost surely, 2^20572325 is an apocalyptic number.

20572325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20572325 is a deficient number, since it is larger than the sum of its proper divisors (4937389).

20572325 is an equidigital number, since it uses as much as digits as its factorization.

20572325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822903 (or 822898 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20572325 is about 4535.6724969953. The cubic root of 20572325 is about 274.0066641958.

Adding to 20572325 its reverse (52327502), we get a palindrome (72899827).

The spelling of 20572325 in words is "twenty million, five hundred seventy-two thousand, three hundred twenty-five".