21342340422 has 36 divisors (see below), whose sum is σ = 50072421204. Its totient is φ = 6566873040.

The previous prime is 21342340307. The next prime is 21342340433. The reversal of 21342340422 is 22404324312.

21342340422 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 234 + 0 + 422 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3504904 + ... + 3510987.

It is an arithmetic number, because the mean of its divisors is an integer number (1390900589).

Almost surely, 2^21342340422 is an apocalyptic number.

21342340422 is an abundant number, since it is smaller than the sum of its proper divisors (28730080782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21342340422 is a wasteful number, since it uses less digits than its factorization.

21342340422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7015925 (or 7015909 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21342340422 its reverse (22404324312), we get a palindrome (43746664734).

The spelling of 21342340422 in words is "twenty-one billion, three hundred forty-two million, three hundred forty thousand, four hundred twenty-two".