20265697 has 2 divisors, whose sum is σ = 20265698. Its totient is φ = 20265696.

The previous prime is 20265671. The next prime is 20265701. The reversal of 20265697 is 79656202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 3651921 = 4076^2 + 1911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20265697 is a prime.

It is equal to p_1286389 and since 20265697 and 1286389 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20265667) 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 as a sum of consecutive naturals, namely, 10132848 + 10132849.

It is an arithmetic number, because the mean of its divisors is an integer number (10132849).

Almost surely, 2^20265697 is an apocalyptic number.

It is an amenable number.

20265697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20265697 is an equidigital number, since it uses as much as digits as its factorization.

20265697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20265697 is about 4501.7437732505. The cubic root of 20265697 is about 272.6384987398.

The spelling of 20265697 in words is "twenty million, two hundred sixty-five thousand, six hundred ninety-seven".