20766241 has 2 divisors, whose sum is σ = 20766242. Its totient is φ = 20766240.

The previous prime is 20766211. The next prime is 20766253. The reversal of 20766241 is 14266702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13476241 + 7290000 = 3671^2 + 2700^2 .

It is a cyclic number.

It is not a de Polignac number, because 20766241 - 2⁷ = 20766113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20766211) 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, 10383120 + 10383121.

It is an arithmetic number, because the mean of its divisors is an integer number (10383121).

Almost surely, 2^20766241 is an apocalyptic number.

It is an amenable number.

20766241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20766241 is an equidigital number, since it uses as much as digits as its factorization.

20766241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20766241 is about 4556.9991222295. Note that the first 3 decimals coincide. The cubic root of 20766241 is about 274.8649077522.

The spelling of 20766241 in words is "twenty million, seven hundred sixty-six thousand, two hundred forty-one".