20693593 has 2 divisors, whose sum is σ = 20693594. Its totient is φ = 20693592.

The previous prime is 20693591. The next prime is 20693597. The reversal of 20693593 is 39539602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15976009 + 4717584 = 3997^2 + 2172^2 .

It is a cyclic number.

It is not a de Polignac number, because 20693593 - 2¹ = 20693591 is a prime.

Together with 20693591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20693591) 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, 10346796 + 10346797.

It is an arithmetic number, because the mean of its divisors is an integer number (10346797).

Almost surely, 2^20693593 is an apocalyptic number.

It is an amenable number.

20693593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20693593 is an equidigital number, since it uses as much as digits as its factorization.

20693593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 20693593 is about 4549.0211034903. The cubic root of 20693593 is about 274.5440068441.

The spelling of 20693593 in words is "twenty million, six hundred ninety-three thousand, five hundred ninety-three".