21440543224 has 16 divisors (see below), whose sum is σ = 40204344600. Its totient is φ = 10719384672.

The previous prime is 21440543153. The next prime is 21440543231. The reversal of 21440543224 is 42234504412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822 + ... + 207085.

Almost surely, 2^21440543224 is an apocalyptic number.

It is an amenable number.

21440543224 is a deficient number, since it is larger than the sum of its proper divisors (18763801376).

21440543224 is a wasteful number, since it uses less digits than its factorization.

21440543224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221742 (or 221738 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The spelling of 21440543224 in words is "twenty-one billion, four hundred forty million, five hundred forty-three thousand, two hundred twenty-four".