21204033324 has 24 divisors (see below), whose sum is σ = 49965942768. Its totient is φ = 6998030400.

The previous prime is 21204033317. The next prime is 21204033329. The reversal of 21204033324 is 42333040212.

It is a super-2 number, since 2×21204033324² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21204033294 and 21204033303.

It is not an unprimeable number, because it can be changed into a prime (21204033329) 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, 8746327 + ... + 8748750.

It is an arithmetic number, because the mean of its divisors is an integer number (2081914282).

Almost surely, 2^21204033324 is an apocalyptic number.

It is an amenable number.

21204033324 is an abundant number, since it is smaller than the sum of its proper divisors (28761909444).

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

21204033324 is a wasteful number, since it uses less digits than its factorization.

21204033324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495185 (or 17495183 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21204033324 its reverse (42333040212), we get a palindrome (63537073536).

The spelling of 21204033324 in words is "twenty-one billion, two hundred four million, thirty-three thousand, three hundred twenty-four".