21234324004 has 6 divisors (see below), whose sum is σ = 37160067014. Its totient is φ = 10617162000.

The previous prime is 21234323989. The next prime is 21234324049. The reversal of 21234324004 is 40042343212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14035140900 + 7199183104 = 118470^2 + 84848^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21234324004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654290497 + ... + 2654290504.

Almost surely, 2^21234324004 is an apocalyptic number.

It is an amenable number.

21234324004 is a deficient number, since it is larger than the sum of its proper divisors (15925743010).

21234324004 is a wasteful number, since it uses less digits than its factorization.

21234324004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308581005 (or 5308581003 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21234324004 its reverse (40042343212), we get a palindrome (61276667216).

The spelling of 21234324004 in words is "twenty-one billion, two hundred thirty-four million, three hundred twenty-four thousand, four".