20258897 has 2 divisors, whose sum is σ = 20258898. Its totient is φ = 20258896.

The previous prime is 20258873. The next prime is 20258911. The reversal of 20258897 is 79885202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11282881 + 8976016 = 3359^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 20258897 - 2²² = 16064593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20258867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10129448 + 10129449.

It is an arithmetic number, because the mean of its divisors is an integer number (10129449).

Almost surely, 2^20258897 is an apocalyptic number.

It is an amenable number.

20258897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20258897 is an equidigital number, since it uses as much as digits as its factorization.

20258897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 20258897 is about 4500.9884469969. The cubic root of 20258897 is about 272.6080014058.

The spelling of 20258897 in words is "twenty million, two hundred fifty-eight thousand, eight hundred ninety-seven".