21344304433 has 8 divisors (see below), whose sum is σ = 21557793600. Its totient is φ = 21131671728.

The previous prime is 21344304391. The next prime is 21344304461. The reversal of 21344304433 is 33440344312.

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 21344304433 - 2³³ = 12754369841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21344304395 and 21344304404.

It is not an unprimeable number, because it can be changed into a prime (21344304473) 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, 163966 + ... + 263767.

It is an arithmetic number, because the mean of its divisors is an integer number (2694724200).

Almost surely, 2^21344304433 is an apocalyptic number.

It is an amenable number.

21344304433 is a deficient number, since it is larger than the sum of its proper divisors (213489167).

21344304433 is a wasteful number, since it uses less digits than its factorization.

21344304433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428231.

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

Adding to 21344304433 its reverse (33440344312), we get a palindrome (54784648745).

The spelling of 21344304433 in words is "twenty-one billion, three hundred forty-four million, three hundred four thousand, four hundred thirty-three".