21044444312 has 16 divisors (see below), whose sum is σ = 39678773400. Its totient is φ = 10463438080.

The previous prime is 21044444287. The next prime is 21044444339. The reversal of 21044444312 is 21344444012.

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 in 3 ways as a sum of consecutive naturals, for example, 7346489 + ... + 7349352.

Almost surely, 2^21044444312 is an apocalyptic number.

It is an amenable number.

21044444312 is a deficient number, since it is larger than the sum of its proper divisors (18634329088).

21044444312 is a wasteful number, since it uses less digits than its factorization.

21044444312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14696026 (or 14696022 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21044444312 its reverse (21344444012), we get a palindrome (42388888324).

The spelling of 21044444312 in words is "twenty-one billion, forty-four million, four hundred forty-four thousand, three hundred twelve".