21324224032 has 48 divisors (see below), whose sum is σ = 42283648512. Its totient is φ = 10585742080.

The previous prime is 21324224021. The next prime is 21324224069. The reversal of 21324224032 is 23042242312.

It is a junction number, because it is equal to n+sod(n) for n = 21324223988 and 21324224006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3437958 + ... + 3444154.

It is an arithmetic number, because the mean of its divisors is an integer number (880909344).

Almost surely, 2^21324224032 is an apocalyptic number.

It is an amenable number.

21324224032 is a deficient number, since it is larger than the sum of its proper divisors (20959424480).

21324224032 is a wasteful number, since it uses less digits than its factorization.

21324224032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961 (or 6953 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21324224032 its reverse (23042242312), we get a palindrome (44366466344).

The spelling of 21324224032 in words is "twenty-one billion, three hundred twenty-four million, two hundred twenty-four thousand, thirty-two".