20365957 has 2 divisors, whose sum is σ = 20365958. Its totient is φ = 20365956.

The previous prime is 20365901. The next prime is 20365973. The reversal of 20365957 is 75956302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 349281 = 4474^2 + 591^2 .

It is a cyclic number.

It is not a de Polignac number, because 20365957 - 2¹⁵ = 20333189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20365997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182978 + 10182979.

It is an arithmetic number, because the mean of its divisors is an integer number (10182979).

Almost surely, 2^20365957 is an apocalyptic number.

It is an amenable number.

20365957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20365957 is an equidigital number, since it uses as much as digits as its factorization.

20365957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 20365957 is about 4512.8657192520. The cubic root of 20365957 is about 273.0873653126.

The spelling of 20365957 in words is "twenty million, three hundred sixty-five thousand, nine hundred fifty-seven".