21343322343 has 12 divisors (see below), whose sum is σ = 33103928760. Its totient is φ = 12196184112.

The previous prime is 21343322309. The next prime is 21343322369. The reversal of 21343322343 is 34322334312.

It is not a de Polignac number, because 21343322343 - 2¹³ = 21343314151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21343322343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343322543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72596188 + ... + 72596481.

It is an arithmetic number, because the mean of its divisors is an integer number (2758660730).

Almost surely, 2^21343322343 is an apocalyptic number.

21343322343 is a deficient number, since it is larger than the sum of its proper divisors (11760606417).

21343322343 is a wasteful number, since it uses less digits than its factorization.

21343322343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145192686 (or 145192679 counting only the distinct ones).

The product of its digits is 31104, while the sum is 30.

Adding to 21343322343 its reverse (34322334312), we get a palindrome (55665656655).

The spelling of 21343322343 in words is "twenty-one billion, three hundred forty-three million, three hundred twenty-two thousand, three hundred forty-three".