21332044424 has 32 divisors (see below), whose sum is σ = 40217385600. Its totient is φ = 10607526720.

The previous prime is 21332044403. The next prime is 21332044427. The reversal of 21332044424 is 42444023312.

It is a super-2 number, since 2×21332044424² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21332044427) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1543754 + ... + 1557510.

It is an arithmetic number, because the mean of its divisors is an integer number (1256793300).

Almost surely, 2^21332044424 is an apocalyptic number.

It is an amenable number.

21332044424 is a deficient number, since it is larger than the sum of its proper divisors (18885341176).

21332044424 is a wasteful number, since it uses less digits than its factorization.

21332044424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14813 (or 14809 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21332044424 its reverse (42444023312), we get a palindrome (63776067736).

The spelling of 21332044424 in words is "twenty-one billion, three hundred thirty-two million, forty-four thousand, four hundred twenty-four".