20839141 has 2 divisors, whose sum is σ = 20839142. Its totient is φ = 20839140.

The previous prime is 20839129. The next prime is 20839157. The reversal of 20839141 is 14193802.

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., 12630916 + 8208225 = 3554^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20839141 - 2⁵ = 20839109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20830141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10419570 + 10419571.

It is an arithmetic number, because the mean of its divisors is an integer number (10419571).

Almost surely, 2^20839141 is an apocalyptic number.

It is an amenable number.

20839141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20839141 is an equidigital number, since it uses as much as digits as its factorization.

20839141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20839141 is about 4564.9907995526. The cubic root of 20839141 is about 275.1861703561.

The spelling of 20839141 in words is "twenty million, eight hundred thirty-nine thousand, one hundred forty-one".