20871341 has 2 divisors, whose sum is σ = 20871342. Its totient is φ = 20871340.

The previous prime is 20871311. The next prime is 20871343. The reversal of 20871341 is 14317802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 8726116 = 3485^2 + 2954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20871341 is a prime.

It is a super-2 number, since 2×20871341² = 871225750276562, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20871343, it forms a pair of twin primes.

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 20871341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20871343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10435670 + 10435671.

It is an arithmetic number, because the mean of its divisors is an integer number (10435671).

Almost surely, 2^20871341 is an apocalyptic number.

It is an amenable number.

20871341 is a deficient number, since it is larger than the sum of its proper divisors (1).

20871341 is an equidigital number, since it uses as much as digits as its factorization.

20871341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20871341 is about 4568.5162799316. The cubic root of 20871341 is about 275.3278338199.

It can be divided in two parts, 20871 and 341, that added together give a palindrome (21212).

The spelling of 20871341 in words is "twenty million, eight hundred seventy-one thousand, three hundred forty-one".