20626841 has 2 divisors, whose sum is σ = 20626842. Its totient is φ = 20626840.

The previous prime is 20626789. The next prime is 20626847. The reversal of 20626841 is 14862602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19545241 + 1081600 = 4421^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20626841 - 2¹⁰ = 20625817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20626847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313420 + 10313421.

It is an arithmetic number, because the mean of its divisors is an integer number (10313421).

Almost surely, 2^20626841 is an apocalyptic number.

It is an amenable number.

20626841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20626841 is an equidigital number, since it uses as much as digits as its factorization.

20626841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20626841 is about 4541.6782140526. The cubic root of 20626841 is about 274.2484869981.

The spelling of 20626841 in words is "twenty million, six hundred twenty-six thousand, eight hundred forty-one".