21042004344032 has 96 divisors (see below), whose sum is σ = 47682906118848. Its totient is φ = 8953634267136.

The previous prime is 21042004344007. The next prime is 21042004344059. The reversal of 21042004344032 is 23044340024012.

It is a super-2 number, since 2×21042004344032² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21042004343986 and 21042004344004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45382238 + ... + 45843554.

It is an arithmetic number, because the mean of its divisors is an integer number (496696938738).

Almost surely, 2^{21042004344032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21042004344032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23841453059424).

21042004344032 is an abundant number, since it is smaller than the sum of its proper divisors (26640901774816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21042004344032 is a wasteful number, since it uses less digits than its factorization.

21042004344032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462788 (or 462780 counting only the distinct ones).

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

Adding to 21042004344032 its reverse (23044340024012), we get a palindrome (44086344368044).

The spelling of 21042004344032 in words is "twenty-one trillion, forty-two billion, four million, three hundred forty-four thousand, thirty-two".