20396933 has 2 divisors, whose sum is σ = 20396934. Its totient is φ = 20396932.

The previous prime is 20396867. The next prime is 20396939. The reversal of 20396933 is 33969302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 2815684 = 4193^2 + 1678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20396933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20396893 and 20396902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20396939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198466 + 10198467.

It is an arithmetic number, because the mean of its divisors is an integer number (10198467).

Almost surely, 2^20396933 is an apocalyptic number.

It is an amenable number.

20396933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20396933 is an equidigital number, since it uses as much as digits as its factorization.

20396933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 20396933 is about 4516.2963808856. The cubic root of 20396933 is about 273.2257476982.

The spelling of 20396933 in words is "twenty million, three hundred ninety-six thousand, nine hundred thirty-three".