21324014304224 has 12 divisors (see below), whose sum is σ = 41981653161504. Its totient is φ = 10662007152096.

The previous prime is 21324014304209. The next prime is 21324014304269. The reversal of 21324014304224 is 42240341042312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 666375447007 = 21324014304224 / (2 + 1 + 3 + 2 + 4 + 0 + 1 + 4 + 3 + 0 + 4 + 2 + 2 + 4).

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, 333187723472 + ... + 333187723535.

It is an arithmetic number, because the mean of its divisors is an integer number (3498471096792).

Almost surely, 2^{21324014304224} is an apocalyptic number.

It is an amenable number.

21324014304224 is a deficient number, since it is larger than the sum of its proper divisors (20657638857280).

21324014304224 is an equidigital number, since it uses as much as digits as its factorization.

21324014304224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666375447017 (or 666375447009 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21324014304224 its reverse (42240341042312), we get a palindrome (63564355346536).

The spelling of 21324014304224 in words is "twenty-one trillion, three hundred twenty-four billion, fourteen million, three hundred four thousand, two hundred twenty-four".