20443141441421 has 2 divisors, whose sum is σ = 20443141441422. Its totient is φ = 20443141441420.

The previous prime is 20443141441351. The next prime is 20443141441517. The reversal of 20443141441421 is 12414414134402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19877954740900 + 565186700521 = 4458470^2 + 751789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20443141441421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20443141431421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221570720710 + 10221570720711.

It is an arithmetic number, because the mean of its divisors is an integer number (10221570720711).

Almost surely, 2^{20443141441421} is an apocalyptic number.

It is an amenable number.

20443141441421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443141441421 is an equidigital number, since it uses as much as digits as its factorization.

20443141441421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 35.

Adding to 20443141441421 its reverse (12414414134402), we get a palindrome (32857555575823).

The spelling of 20443141441421 in words is "twenty trillion, four hundred forty-three billion, one hundred forty-one million, four hundred forty-one thousand, four hundred twenty-one".