21344234443 has 8 divisors (see below), whose sum is σ = 24395997920. Its totient is φ = 18293117760.

The previous prime is 21344234441. The next prime is 21344234473. The reversal of 21344234443 is 34443244312.

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

It is a cyclic number.

It is not a de Polignac number, because 21344234443 - 2¹ = 21344234441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21344234399 and 21344234408.

It is not an unprimeable number, because it can be changed into a prime (21344234441) 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, 88788 + ... + 224881.

It is an arithmetic number, because the mean of its divisors is an integer number (3049499740).

Almost surely, 2^21344234443 is an apocalyptic number.

21344234443 is a deficient number, since it is larger than the sum of its proper divisors (3051763477).

21344234443 is an equidigital number, since it uses as much as digits as its factorization.

21344234443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323397.

The product of its digits is 110592, while the sum is 34.

Adding to 21344234443 its reverse (34443244312), we get a palindrome (55787478755).

The spelling of 21344234443 in words is "twenty-one billion, three hundred forty-four million, two hundred thirty-four thousand, four hundred forty-three".