21344342233 has 8 divisors (see below), whose sum is σ = 21866906376. Its totient is φ = 20821872000.

The previous prime is 21344342219. The next prime is 21344342251. The reversal of 21344342233 is 33224344312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10037635344 + 11306706889 = 100188^2 + 106333^2 .

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-21344342233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21344342195 and 21344342204.

It is not an unprimeable number, because it can be changed into a prime (21344342203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724083 + ... + 752983.

It is an arithmetic number, because the mean of its divisors is an integer number (2733363297).

Almost surely, 2^21344342233 is an apocalyptic number.

It is an amenable number.

21344342233 is a deficient number, since it is larger than the sum of its proper divisors (522564143).

21344342233 is a wasteful number, since it uses less digits than its factorization.

21344342233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46955.

The product of its digits is 41472, while the sum is 31.

Adding to 21344342233 its reverse (33224344312), we get a palindrome (54568686545).

The spelling of 21344342233 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-two thousand, two hundred thirty-three".