20790293 has 2 divisors, whose sum is σ = 20790294. Its totient is φ = 20790292.

The previous prime is 20790283. The next prime is 20790299. The reversal of 20790293 is 39209702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 925444 = 4457^2 + 962^2 .

It is a cyclic number.

It is not a de Polignac number, because 20790293 - 2⁴ = 20790277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20790299) 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, 10395146 + 10395147.

It is an arithmetic number, because the mean of its divisors is an integer number (10395147).

Almost surely, 2^20790293 is an apocalyptic number.

It is an amenable number.

20790293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20790293 is an equidigital number, since it uses as much as digits as its factorization.

20790293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 20790293 is about 4559.6373759324. The cubic root of 20790293 is about 274.9709853686.

Adding to 20790293 its reverse (39209702), we get a palindrome (59999995).

The spelling of 20790293 in words is "twenty million, seven hundred ninety thousand, two hundred ninety-three".