21044034052 has 12 divisors (see below), whose sum is σ = 38993357340. Its totient is φ = 9903074816.

The previous prime is 21044034031. The next prime is 21044034059. The reversal of 21044034052 is 25043044012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11546362116 + 9497671936 = 107454^2 + 97456^2 .

It is not an unprimeable number, because it can be changed into a prime (21044034059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154735477 + ... + 154735612.

It is an arithmetic number, because the mean of its divisors is an integer number (3249446445).

Almost surely, 2^21044034052 is an apocalyptic number.

It is an amenable number.

21044034052 is a deficient number, since it is larger than the sum of its proper divisors (17949323288).

21044034052 is a wasteful number, since it uses less digits than its factorization.

21044034052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309471110 (or 309471108 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 21044034052 its reverse (25043044012), we get a palindrome (46087078064).

The spelling of 21044034052 in words is "twenty-one billion, forty-four million, thirty-four thousand, fifty-two".