21004024324424 has 16 divisors (see below), whose sum is σ = 41094830200320. Its totient is φ = 10045402937680.

The previous prime is 21004024324397. The next prime is 21004024324429. The reversal of 21004024324424 is 42442342040012.

It is not an unprimeable number, because it can be changed into a prime (21004024324429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57076152872 + ... + 57076153239.

It is an arithmetic number, because the mean of its divisors is an integer number (2568426887520).

Almost surely, 2^{21004024324424} is an apocalyptic number.

It is an amenable number.

21004024324424 is a deficient number, since it is larger than the sum of its proper divisors (20090805875896).

21004024324424 is a wasteful number, since it uses less digits than its factorization.

21004024324424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114152306140 (or 114152306136 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 21004024324424 its reverse (42442342040012), we get a palindrome (63446366364436).

The spelling of 21004024324424 in words is "twenty-one trillion, four billion, twenty-four million, three hundred twenty-four thousand, four hundred twenty-four".