21344410234 has 16 divisors (see below), whose sum is σ = 37852156800. Its totient is φ = 8832169584.

The previous prime is 21344410181. The next prime is 21344410237. The reversal of 21344410234 is 43201444312.

It is not an unprimeable number, because it can be changed into a prime (21344410237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26285814 + ... + 26286625.

It is an arithmetic number, because the mean of its divisors is an integer number (2365759800).

Almost surely, 2^21344410234 is an apocalyptic number.

21344410234 is a deficient number, since it is larger than the sum of its proper divisors (16507746566).

21344410234 is a wasteful number, since it uses less digits than its factorization.

21344410234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52572477.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21344410234 its reverse (43201444312), we get a palindrome (64545854546).

The spelling of 21344410234 in words is "twenty-one billion, three hundred forty-four million, four hundred ten thousand, two hundred thirty-four".