20572265 has 16 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 14061120.

The previous prime is 20572249. The next prime is 20572267. The reversal of 20572265 is 56227502.

It is not a de Polignac number, because 20572265 - 2⁴ = 20572249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20572267) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12860 + ... + 14370.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^20572265 is an apocalyptic number.

It is an amenable number.

20572265 is a deficient number, since it is larger than the sum of its proper divisors (7732375).

20572265 is a wasteful number, since it uses less digits than its factorization.

20572265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20572265 is about 4535.6658827564. The cubic root of 20572265 is about 274.0063978118.

Adding to 20572265 its reverse (56227502), we get a palindrome (76799767).

The spelling of 20572265 in words is "twenty million, five hundred seventy-two thousand, two hundred sixty-five".