20502193 has 2 divisors, whose sum is σ = 20502194. Its totient is φ = 20502192.

The previous prime is 20502179. The next prime is 20502203. The reversal of 20502193 is 39120502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 8464 = 4527^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20502193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502113) 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, 10251096 + 10251097.

It is an arithmetic number, because the mean of its divisors is an integer number (10251097).

Almost surely, 2^20502193 is an apocalyptic number.

It is an amenable number.

20502193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502193 is an equidigital number, since it uses as much as digits as its factorization.

20502193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20502193 is about 4527.9347389290. The cubic root of 20502193 is about 273.6949426051.

Adding to 20502193 its reverse (39120502), we get a palindrome (59622695).

The spelling of 20502193 in words is "twenty million, five hundred two thousand, one hundred ninety-three".