20536057 has 2 divisors, whose sum is σ = 20536058. Its totient is φ = 20536056.

The previous prime is 20536013. The next prime is 20536063. The reversal of 20536057 is 75063502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 1430416 = 4371^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 20536057 - 2⁷ = 20535929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20536457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268028 + 10268029.

It is an arithmetic number, because the mean of its divisors is an integer number (10268029).

Almost surely, 2^20536057 is an apocalyptic number.

It is an amenable number.

20536057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536057 is an equidigital number, since it uses as much as digits as its factorization.

20536057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 20536057 is about 4531.6726492544. The cubic root of 20536057 is about 273.8455493761.

Adding to 20536057 its reverse (75063502), we get a palindrome (95599559).

The spelling of 20536057 in words is "twenty million, five hundred thirty-six thousand, fifty-seven".