20881141 has 2 divisors, whose sum is σ = 20881142. Its totient is φ = 20881140.

The previous prime is 20881123. The next prime is 20881163. The reversal of 20881141 is 14118802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15800625 + 5080516 = 3975^2 + 2254^2 .

It is a cyclic number.

It is not a de Polignac number, because 20881141 - 2⁵ = 20881109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20881111) 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, 10440570 + 10440571.

It is an arithmetic number, because the mean of its divisors is an integer number (10440571).

Almost surely, 2^20881141 is an apocalyptic number.

It is an amenable number.

20881141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20881141 is an equidigital number, since it uses as much as digits as its factorization.

20881141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 20881141 is about 4569.5887123460. The cubic root of 20881141 is about 275.3709198642.

Adding to 20881141 its reverse (14118802), we get a palindrome (34999943).

The spelling of 20881141 in words is "twenty million, eight hundred eighty-one thousand, one hundred forty-one".