20730893 has 2 divisors, whose sum is σ = 20730894. Its totient is φ = 20730892.

The previous prime is 20730887. The next prime is 20730917. The reversal of 20730893 is 39803702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15264649 + 5466244 = 3907^2 + 2338^2 .

It is a cyclic number.

It is not a de Polignac number, because 20730893 - 2¹⁴ = 20714509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20730823) 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, 10365446 + 10365447.

It is an arithmetic number, because the mean of its divisors is an integer number (10365447).

Almost surely, 2^20730893 is an apocalyptic number.

It is an amenable number.

20730893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20730893 is an equidigital number, since it uses as much as digits as its factorization.

20730893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20730893 is about 4553.1190408334. The cubic root of 20730893 is about 274.7088621340.

The spelling of 20730893 in words is "twenty million, seven hundred thirty thousand, eight hundred ninety-three".