20759231 has 2 divisors, whose sum is σ = 20759232. Its totient is φ = 20759230.

The previous prime is 20759203. The next prime is 20759251. The reversal of 20759231 is 13295702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20759231 - 2²² = 16564927 is a prime.

It is a super-2 number, since 2×20759231² = 861891343422722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20759194 and 20759203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20759201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10379615 + 10379616.

It is an arithmetic number, because the mean of its divisors is an integer number (10379616).

Almost surely, 2^20759231 is an apocalyptic number.

20759231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20759231 is an equidigital number, since it uses as much as digits as its factorization.

20759231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20759231 is about 4556.2299107925. The cubic root of 20759231 is about 274.8339758204.

The spelling of 20759231 in words is "twenty million, seven hundred fifty-nine thousand, two hundred thirty-one".