21544433011324 has 6 divisors (see below), whose sum is σ = 37702757769824. Its totient is φ = 10772216505660.

The previous prime is 21544433011253. The next prime is 21544433011393. The reversal of 21544433011324 is 42311033444512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2693054126412 + ... + 2693054126419.

Almost surely, 2^{21544433011324} is an apocalyptic number.

It is an amenable number.

21544433011324 is a deficient number, since it is larger than the sum of its proper divisors (16158324758500).

21544433011324 is a wasteful number, since it uses less digits than its factorization.

21544433011324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386108252835 (or 5386108252833 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 21544433011324 its reverse (42311033444512), we get a palindrome (63855466455836).

The spelling of 21544433011324 in words is "twenty-one trillion, five hundred forty-four billion, four hundred thirty-three million, eleven thousand, three hundred twenty-four".