20803259 has 2 divisors, whose sum is σ = 20803260. Its totient is φ = 20803258.

The previous prime is 20803253. The next prime is 20803267. The reversal of 20803259 is 95230802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20803259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20803253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10401629 + 10401630.

It is an arithmetic number, because the mean of its divisors is an integer number (10401630).

Almost surely, 2^20803259 is an apocalyptic number.

20803259 is a deficient number, since it is larger than the sum of its proper divisors (1).

20803259 is an equidigital number, since it uses as much as digits as its factorization.

20803259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20803259 is about 4561.0589779129. The cubic root of 20803259 is about 275.0281359642.

The spelling of 20803259 in words is "twenty million, eight hundred three thousand, two hundred fifty-nine".