20842933 has 2 divisors, whose sum is σ = 20842934. Its totient is φ = 20842932.

The previous prime is 20842919. The next prime is 20842937. The reversal of 20842933 is 33924802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 1684804 = 4377^2 + 1298^2 .

It is a cyclic number.

It is not a de Polignac number, because 20842933 - 2⁹ = 20842421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20842895 and 20842904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20842937) 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, 10421466 + 10421467.

It is an arithmetic number, because the mean of its divisors is an integer number (10421467).

Almost surely, 2^20842933 is an apocalyptic number.

It is an amenable number.

20842933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20842933 is an equidigital number, since it uses as much as digits as its factorization.

20842933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20842933 is about 4565.4061155608. The cubic root of 20842933 is about 275.2028607861.

The spelling of 20842933 in words is "twenty million, eight hundred forty-two thousand, nine hundred thirty-three".