21344300342 has 4 divisors (see below), whose sum is σ = 32016450516. Its totient is φ = 10672150170.

The previous prime is 21344300323. The next prime is 21344300359. The reversal of 21344300342 is 24300344312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5336075084 + ... + 5336075087.

It is an arithmetic number, because the mean of its divisors is an integer number (8004112629).

Almost surely, 2^21344300342 is an apocalyptic number.

21344300342 is a deficient number, since it is larger than the sum of its proper divisors (10672150174).

21344300342 is a wasteful number, since it uses less digits than its factorization.

21344300342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10672150173.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21344300342 its reverse (24300344312), we get a palindrome (45644644654).

The spelling of 21344300342 in words is "twenty-one billion, three hundred forty-four million, three hundred thousand, three hundred forty-two".