21743341 has 2 divisors, whose sum is σ = 21743342. Its totient is φ = 21743340.

The previous prime is 21743317. The next prime is 21743413. The reversal of 21743341 is 14334712.

Together with next prime (21743413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 6022116 = 3965^2 + 2454^2 .

It is a cyclic number.

It is not a de Polignac number, because 21743341 - 2⁷ = 21743213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21743641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871670 + 10871671.

It is an arithmetic number, because the mean of its divisors is an integer number (10871671).

Almost surely, 2^21743341 is an apocalyptic number.

It is an amenable number.

21743341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743341 is an equidigital number, since it uses as much as digits as its factorization.

21743341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 21743341 is about 4662.9755521555. The cubic root of 21743341 is about 279.1100185744.

It can be divided in two parts, 217433 and 41, that multiplied together give a triangular number (8914753 = T₄₂₂₂).

The spelling of 21743341 in words is "twenty-one million, seven hundred forty-three thousand, three hundred forty-one".