21404322244 has 24 divisors (see below), whose sum is σ = 39646880000. Its totient is φ = 10082867040.

The previous prime is 21404322239. The next prime is 21404322271. The reversal of 21404322244 is 44222340412.

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 7 ways as a sum of consecutive naturals, for example, 764244 + ... + 791755.

Almost surely, 2^21404322244 is an apocalyptic number.

It is an amenable number.

21404322244 is a deficient number, since it is larger than the sum of its proper divisors (18242557756).

21404322244 is a wasteful number, since it uses less digits than its factorization.

21404322244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556203 (or 1556201 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21404322244 its reverse (44222340412), we get a palindrome (65626662656).

The spelling of 21404322244 in words is "twenty-one billion, four hundred four million, three hundred twenty-two thousand, two hundred forty-four".