21044333055 has 16 divisors (see below), whose sum is σ = 34132180320. Its totient is φ = 11069895168.

The previous prime is 21044333027. The next prime is 21044333119. The reversal of 21044333055 is 55033344012.

It is not a de Polignac number, because 21044333055 - 2⁷ = 21044332927 is a prime.

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, 9608190 + ... + 9610379.

It is an arithmetic number, because the mean of its divisors is an integer number (2133261270).

Almost surely, 2^21044333055 is an apocalyptic number.

21044333055 is a deficient number, since it is larger than the sum of its proper divisors (13087847265).

21044333055 is a wasteful number, since it uses less digits than its factorization.

21044333055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19218650.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 21044333055 its reverse (55033344012), we get a palindrome (76077677067).

The spelling of 21044333055 in words is "twenty-one billion, forty-four million, three hundred thirty-three thousand, fifty-five".