20746393 has 2 divisors, whose sum is σ = 20746394. Its totient is φ = 20746392.

The previous prime is 20746387. The next prime is 20746417. The reversal of 20746393 is 39364702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14531344 + 6215049 = 3812^2 + 2493^2 .

It is a cyclic number.

It is not a de Polignac number, because 20746393 - 2¹⁷ = 20615321 is a prime.

It is not a weakly prime, because it can be changed into another prime (20746303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10373196 + 10373197.

It is an arithmetic number, because the mean of its divisors is an integer number (10373197).

Almost surely, 2^20746393 is an apocalyptic number.

It is an amenable number.

20746393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20746393 is an equidigital number, since it uses as much as digits as its factorization.

20746393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20746393 is about 4554.8208526791. The cubic root of 20746393 is about 274.7773095248. Note that the first 3 decimals are identical.

The spelling of 20746393 in words is "twenty million, seven hundred forty-six thousand, three hundred ninety-three".