21342323422 has 16 divisors (see below), whose sum is σ = 36589184352. Its totient is φ = 9146124000.

The previous prime is 21342323419. The next prime is 21342323437. The reversal of 21342323422 is 22432324312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233928 + ... + 312100.

It is an arithmetic number, because the mean of its divisors is an integer number (2286824022).

Almost surely, 2^21342323422 is an apocalyptic number.

21342323422 is a deficient number, since it is larger than the sum of its proper divisors (15246860930).

21342323422 is a wasteful number, since it uses less digits than its factorization.

21342323422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97683.

The product of its digits is 13824, while the sum is 28.

Adding to 21342323422 its reverse (22432324312), we get a palindrome (43774647734).

The spelling of 21342323422 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-three thousand, four hundred twenty-two".