20575897 has 2 divisors, whose sum is σ = 20575898. Its totient is φ = 20575896.

The previous prime is 20575873. The next prime is 20575937. The reversal of 20575897 is 79857502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16232841 + 4343056 = 4029^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 20575897 - 2⁷ = 20575769 is a prime.

It is not a weakly prime, because it can be changed into another prime (20575817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10287948 + 10287949.

It is an arithmetic number, because the mean of its divisors is an integer number (10287949).

Almost surely, 2^20575897 is an apocalyptic number.

It is an amenable number.

20575897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20575897 is an equidigital number, since it uses as much as digits as its factorization.

20575897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 20575897 is about 4536.0662473117. The cubic root of 20575897 is about 274.0225219912.

The spelling of 20575897 in words is "twenty million, five hundred seventy-five thousand, eight hundred ninety-seven".