21344342204 has 12 divisors (see below), whose sum is σ = 37369756200. Its totient is φ = 10667269008.

The previous prime is 21344342203. The next prime is 21344342207. The reversal of 21344342204 is 40224344312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344342203) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1215719 + ... + 1233150.

It is an arithmetic number, because the mean of its divisors is an integer number (3114146350).

Almost surely, 2^21344342204 is an apocalyptic number.

It is an amenable number.

21344342204 is a deficient number, since it is larger than the sum of its proper divisors (16025413996).

21344342204 is a wasteful number, since it uses less digits than its factorization.

21344342204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451052 (or 2451050 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21344342204 its reverse (40224344312), we get a palindrome (61568686516).

The spelling of 21344342204 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-two thousand, two hundred four".