21204044004333 has 16 divisors (see below), whose sum is σ = 28283985518400. Its totient is φ = 14130067132800.

The previous prime is 21204044004301. The next prime is 21204044004379. The reversal of 21204044004333 is 33340044040212.

It is a happy number.

It is not a de Polignac number, because 21204044004333 - 2⁵ = 21204044004301 is a prime.

It is a super-2 number, since 2×21204044004333² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21204044004333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204044004233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71765058 + ... + 72059916.

It is an arithmetic number, because the mean of its divisors is an integer number (1767749094900).

Almost surely, 2^{21204044004333} is an apocalyptic number.

It is an amenable number.

21204044004333 is a deficient number, since it is larger than the sum of its proper divisors (7079941514067).

21204044004333 is a wasteful number, since it uses less digits than its factorization.

21204044004333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304892.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 21204044004333 its reverse (33340044040212), we get a palindrome (54544088044545).

The spelling of 21204044004333 in words is "twenty-one trillion, two hundred four billion, forty-four million, four thousand, three hundred thirty-three".