20525597 has 2 divisors, whose sum is σ = 20525598. Its totient is φ = 20525596.

The previous prime is 20525587. The next prime is 20525611. The reversal of 20525597 is 79552502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15413476 + 5112121 = 3926^2 + 2261^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525597 - 2¹⁴ = 20509213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20525587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262798 + 10262799.

It is an arithmetic number, because the mean of its divisors is an integer number (10262799).

Almost surely, 2^20525597 is an apocalyptic number.

It is an amenable number.

20525597 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525597 is an equidigital number, since it uses as much as digits as its factorization.

20525597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 20525597 is about 4530.5184030086. The cubic root of 20525597 is about 273.7990472504.

The spelling of 20525597 in words is "twenty million, five hundred twenty-five thousand, five hundred ninety-seven".