4021444433423 has 2 divisors, whose sum is σ = 4021444433424. Its totient is φ = 4021444433422.

The previous prime is 4021444433399. The next prime is 4021444433537. The reversal of 4021444433423 is 3243344441204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021444433423 - 2³⁰ = 4020370691599 is a prime.

It is a super-2 number, since 2×4021444433423² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444433323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722216711 + 2010722216712.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722216712).

Almost surely, 2^{4021444433423} is an apocalyptic number.

4021444433423 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444433423 is an equidigital number, since it uses as much as digits as its factorization.

4021444433423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 38.

Adding to 4021444433423 its reverse (3243344441204), we get a palindrome (7264788874627).

The spelling of 4021444433423 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred thirty-three thousand, four hundred twenty-three".