21342344210 has 48 divisors (see below), whose sum is σ = 43124635008. Its totient is φ = 7595707680.

The previous prime is 21342344209. The next prime is 21342344249. The reversal of 21342344210 is 1244324312.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21342344210.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130772 + ... + 244511.

It is an arithmetic number, because the mean of its divisors is an integer number (898429896).

Almost surely, 2^21342344210 is an apocalyptic number.

21342344210 is an abundant number, since it is smaller than the sum of its proper divisors (21782290798).

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

21342344210 is a wasteful number, since it uses less digits than its factorization.

21342344210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375359 (or 375348 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21342344210 its reverse (1244324312), we get a palindrome (22586668522).

The spelling of 21342344210 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-four thousand, two hundred ten".