21450324344423 has 16 divisors (see below), whose sum is σ = 23498632164000. Its totient is φ = 19464698677248.

The previous prime is 21450324344419. The next prime is 21450324344429. The reversal of 21450324344423 is 32444342305412.

It is not a de Polignac number, because 21450324344423 - 2² = 21450324344419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450324344429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1347098 + ... + 6686951.

It is an arithmetic number, because the mean of its divisors is an integer number (1468664510250).

Almost surely, 2^{21450324344423} is an apocalyptic number.

21450324344423 is a deficient number, since it is larger than the sum of its proper divisors (2048307819577).

21450324344423 is an frugal number, since it uses more digits than its factorization.

21450324344423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8034239 (or 8034121 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 41.

Adding to 21450324344423 its reverse (32444342305412), we get a palindrome (53894666649835).

The spelling of 21450324344423 in words is "twenty-one trillion, four hundred fifty billion, three hundred twenty-four million, three hundred forty-four thousand, four hundred twenty-three".