21440200324 has 24 divisors (see below), whose sum is σ = 39576272960. Its totient is φ = 10135012896.

The previous prime is 21440200319. The next prime is 21440200333. The reversal of 21440200324 is 42300204412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21440200295 and 21440200304.

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 7 ways as a sum of consecutive naturals, for example, 252627 + ... + 326650.

Almost surely, 2^21440200324 is an apocalyptic number.

It is an amenable number.

21440200324 is a deficient number, since it is larger than the sum of its proper divisors (18136072636).

21440200324 is a wasteful number, since it uses less digits than its factorization.

21440200324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579787 (or 579785 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21440200324 its reverse (42300204412), we get a palindrome (63740404736).

The spelling of 21440200324 in words is "twenty-one billion, four hundred forty million, two hundred thousand, three hundred twenty-four".