21342323204 has 6 divisors (see below), whose sum is σ = 37349065614. Its totient is φ = 10671161600.

The previous prime is 21342323183. The next prime is 21342323207. The reversal of 21342323204 is 40232324312.

It can be written as a sum of positive squares in only one way, i.e., 20980943104 + 361380100 = 144848^2 + 19010^2 .

It is not an unprimeable number, because it can be changed into a prime (21342323207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2667790397 + ... + 2667790404.

It is an arithmetic number, because the mean of its divisors is an integer number (6224844269).

Almost surely, 2^21342323204 is an apocalyptic number.

It is an amenable number.

21342323204 is a deficient number, since it is larger than the sum of its proper divisors (16006742410).

21342323204 is a wasteful number, since it uses less digits than its factorization.

21342323204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335580805 (or 5335580803 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21342323204 its reverse (40232324312), we get a palindrome (61574647516).

The spelling of 21342323204 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-three thousand, two hundred four".