20650841 has 2 divisors, whose sum is σ = 20650842. Its totient is φ = 20650840.

The previous prime is 20650831. The next prime is 20650909. The reversal of 20650841 is 14805602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 3345241 = 4160^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 20650841 - 2¹⁰ = 20649817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20650841.

It is not a weakly prime, because it can be changed into another prime (20650811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325420 + 10325421.

It is an arithmetic number, because the mean of its divisors is an integer number (10325421).

Almost surely, 2^20650841 is an apocalyptic number.

It is an amenable number.

20650841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650841 is an equidigital number, since it uses as much as digits as its factorization.

20650841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20650841 is about 4544.3196410464. The cubic root of 20650841 is about 274.3548114479.

The spelling of 20650841 in words is "twenty million, six hundred fifty thousand, eight hundred forty-one".