21304143222424 has 8 divisors (see below), whose sum is σ = 39945268542060. Its totient is φ = 10652071611208.

The previous prime is 21304143222379. The next prime is 21304143222431. The reversal of 21304143222424 is 42422234140312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21304143222424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331508951394 + ... + 1331508951409.

Almost surely, 2^{21304143222424} is an apocalyptic number.

It is an amenable number.

21304143222424 is a deficient number, since it is larger than the sum of its proper divisors (18641125319636).

21304143222424 is a wasteful number, since it uses less digits than its factorization.

21304143222424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663017902809 (or 2663017902805 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21304143222424 its reverse (42422234140312), we get a palindrome (63726377362736).

The spelling of 21304143222424 in words is "twenty-one trillion, three hundred four billion, one hundred forty-three million, two hundred twenty-two thousand, four hundred twenty-four".