21343321343 has 8 divisors (see below), whose sum is σ = 21391780608. Its totient is φ = 21294897624.

The previous prime is 21343321261. The next prime is 21343321361. The reversal of 21343321343 is 34312334312.

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 21343321343 - 2²⁰ = 21342272767 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 (21343321393) 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, 1460330 + ... + 1474872.

It is an arithmetic number, because the mean of its divisors is an integer number (2673972576).

Almost surely, 2^21343321343 is an apocalyptic number.

21343321343 is a deficient number, since it is larger than the sum of its proper divisors (48459265).

21343321343 is a wasteful number, since it uses less digits than its factorization.

21343321343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17773.

The product of its digits is 15552, while the sum is 29.

Adding to 21343321343 its reverse (34312334312), we get a palindrome (55655655655).

The spelling of 21343321343 in words is "twenty-one billion, three hundred forty-three million, three hundred twenty-one thousand, three hundred forty-three".