21450324344203 has 8 divisors (see below), whose sum is σ = 21453972368400. Its totient is φ = 21446676649248.

The previous prime is 21450324344177. The next prime is 21450324344231. The reversal of 21450324344203 is 30244342305412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21450324344203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21450324344003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153597933 + ... + 153737521.

It is an arithmetic number, because the mean of its divisors is an integer number (2681746546050).

Almost surely, 2^{21450324344203} is an apocalyptic number.

21450324344203 is a deficient number, since it is larger than the sum of its proper divisors (3648024197).

21450324344203 is a wasteful number, since it uses less digits than its factorization.

21450324344203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164621.

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 21450324344203 its reverse (30244342305412), we get a palindrome (51694666649615).

The spelling of 21450324344203 in words is "twenty-one trillion, four hundred fifty billion, three hundred twenty-four million, three hundred forty-four thousand, two hundred three".