21643073592841 has 2 divisors, whose sum is σ = 21643073592842. Its totient is φ = 21643073592840.

The previous prime is 21643073592839. The next prime is 21643073592977. The reversal of 21643073592841 is 14829537034612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21629987148025 + 13086444816 = 4650805^2 + 114396^2 .

It is a cyclic number.

It is not a de Polignac number, because 21643073592841 - 2¹ = 21643073592839 is a prime.

Together with 21643073592839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21643073590841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10821536796420 + 10821536796421.

It is an arithmetic number, because the mean of its divisors is an integer number (10821536796421).

It is a 1-persistent number, because it is pandigital, but 2⋅21643073592841 = 43286147185682 is not.

Almost surely, 2^{21643073592841} is an apocalyptic number.

It is an amenable number.

21643073592841 is a deficient number, since it is larger than the sum of its proper divisors (1).

21643073592841 is an equidigital number, since it uses as much as digits as its factorization.

21643073592841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 21643073592841 in words is "twenty-one trillion, six hundred forty-three billion, seventy-three million, five hundred ninety-two thousand, eight hundred forty-one".