20793859 has 2 divisors, whose sum is σ = 20793860. Its totient is φ = 20793858.

The previous prime is 20793833. The next prime is 20793931. The reversal of 20793859 is 95839702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20793859 - 2⁹ = 20793347 is a prime.

It is a super-2 number, since 2×20793859² = 864769144223762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20793259) 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, 10396929 + 10396930.

It is an arithmetic number, because the mean of its divisors is an integer number (10396930).

Almost surely, 2^20793859 is an apocalyptic number.

20793859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20793859 is an equidigital number, since it uses as much as digits as its factorization.

20793859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 20793859 is about 4560.0283990344. The cubic root of 20793859 is about 274.9867056934.

The spelling of 20793859 in words is "twenty million, seven hundred ninety-three thousand, eight hundred fifty-nine".