20597933 has 2 divisors, whose sum is σ = 20597934. Its totient is φ = 20597932.

The previous prime is 20597887. The next prime is 20597963. The reversal of 20597933 is 33979502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20593444 + 4489 = 4538^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 20597933 - 2⁶ = 20597869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20597963) 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, 10298966 + 10298967.

It is an arithmetic number, because the mean of its divisors is an integer number (10298967).

Almost surely, 2^20597933 is an apocalyptic number.

It is an amenable number.

20597933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20597933 is an equidigital number, since it uses as much as digits as its factorization.

20597933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 20597933 is about 4538.4945741953. The cubic root of 20597933 is about 274.1203096431.

The spelling of 20597933 in words is "twenty million, five hundred ninety-seven thousand, nine hundred thirty-three".