21330443044 has 24 divisors (see below), whose sum is σ = 37533888000. Its totient is φ = 10606527360.

The previous prime is 21330443039. The next prime is 21330443059. The reversal of 21330443044 is 44034403312.

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 in 7 ways as a sum of consecutive naturals, for example, 2071629 + ... + 2081899.

It is an arithmetic number, because the mean of its divisors is an integer number (1563912000).

Almost surely, 2^21330443044 is an apocalyptic number.

It is an amenable number.

21330443044 is a deficient number, since it is larger than the sum of its proper divisors (16203444956).

21330443044 is a wasteful number, since it uses less digits than its factorization.

21330443044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13083 (or 13081 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21330443044 its reverse (44034403312), we get a palindrome (65364846356).

The spelling of 21330443044 in words is "twenty-one billion, three hundred thirty million, four hundred forty-three thousand, forty-four".