20239841 has 2 divisors, whose sum is σ = 20239842. Its totient is φ = 20239840.

The previous prime is 20239831. The next prime is 20239847. The reversal of 20239841 is 14893202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 250000 = 4471^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 20239841 - 2¹⁴ = 20223457 is a prime.

It is not a weakly prime, because it can be changed into another prime (20239847) 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, 10119920 + 10119921.

It is an arithmetic number, because the mean of its divisors is an integer number (10119921).

Almost surely, 2^20239841 is an apocalyptic number.

It is an amenable number.

20239841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20239841 is an equidigital number, since it uses as much as digits as its factorization.

20239841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20239841 is about 4498.8710806157. The cubic root of 20239841 is about 272.5225007372.

The spelling of 20239841 in words is "twenty million, two hundred thirty-nine thousand, eight hundred forty-one".