20338841 has 2 divisors, whose sum is σ = 20338842. Its totient is φ = 20338840.

The previous prime is 20338837. The next prime is 20338847. The reversal of 20338841 is 14883302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 5929225 = 3796^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 20338841 - 2² = 20338837 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 (20338847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169420 + 10169421.

It is an arithmetic number, because the mean of its divisors is an integer number (10169421).

Almost surely, 2^20338841 is an apocalyptic number.

It is an amenable number.

20338841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20338841 is an equidigital number, since it uses as much as digits as its factorization.

20338841 is an evil number, because the sum of its binary digits is even.

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

The square root of 20338841 is about 4509.8604191261. The cubic root of 20338841 is about 272.9661118916.

The spelling of 20338841 in words is "twenty million, three hundred thirty-eight thousand, eight hundred forty-one".