21330106044 has 24 divisors (see below), whose sum is σ = 53598728400. Its totient is φ = 6563109504.

The previous prime is 21330106027. The next prime is 21330106073. The reversal of 21330106044 is 44060103312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68365569 + ... + 68365880.

It is an arithmetic number, because the mean of its divisors is an integer number (2233280350).

Almost surely, 2^21330106044 is an apocalyptic number.

It is an amenable number.

21330106044 is an abundant number, since it is smaller than the sum of its proper divisors (32268622356).

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

21330106044 is a wasteful number, since it uses less digits than its factorization.

21330106044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136731469 (or 136731467 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21330106044 its reverse (44060103312), we get a palindrome (65390209356).

The spelling of 21330106044 in words is "twenty-one billion, three hundred thirty million, one hundred six thousand, forty-four".