20576393 has 2 divisors, whose sum is σ = 20576394. Its totient is φ = 20576392.

The previous prime is 20576377. The next prime is 20576407. The reversal of 20576393 is 39367502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 7011904 = 3683^2 + 2648^2 .

It is a cyclic number.

It is not a de Polignac number, because 20576393 - 2⁴ = 20576377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20576363) 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, 10288196 + 10288197.

It is an arithmetic number, because the mean of its divisors is an integer number (10288197).

Almost surely, 2^20576393 is an apocalyptic number.

It is an amenable number.

20576393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20576393 is an equidigital number, since it uses as much as digits as its factorization.

20576393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20576393 is about 4536.1209199050. The cubic root of 20576393 is about 274.0247238244.

The spelling of 20576393 in words is "twenty million, five hundred seventy-six thousand, three hundred ninety-three".