21044234132 has 6 divisors (see below), whose sum is σ = 36827409738. Its totient is φ = 10522117064.

The previous prime is 21044234129. The next prime is 21044234173. The reversal of 21044234132 is 23143244012.

It can be written as a sum of positive squares in only one way, i.e., 17933495056 + 3110739076 = 133916^2 + 55774^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630529263 + ... + 2630529270.

It is an arithmetic number, because the mean of its divisors is an integer number (6137901623).

Almost surely, 2^21044234132 is an apocalyptic number.

It is an amenable number.

21044234132 is a deficient number, since it is larger than the sum of its proper divisors (15783175606).

21044234132 is a wasteful number, since it uses less digits than its factorization.

21044234132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261058537 (or 5261058535 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21044234132 its reverse (23143244012), we get a palindrome (44187478144).

The spelling of 21044234132 in words is "twenty-one billion, forty-four million, two hundred thirty-four thousand, one hundred thirty-two".