21133304324 has 24 divisors (see below), whose sum is σ = 40358349696. Its totient is φ = 9602964000.

The previous prime is 21133304303. The next prime is 21133304329. The reversal of 21133304324 is 42340333112.

It is a junction number, because it is equal to n+sod(n) for n = 21133304293 and 21133304302.

It is not an unprimeable number, because it can be changed into a prime (21133304329) 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, 64469 + ... + 215459.

It is an arithmetic number, because the mean of its divisors is an integer number (1681597904).

Almost surely, 2^21133304324 is an apocalyptic number.

It is an amenable number.

21133304324 is a deficient number, since it is larger than the sum of its proper divisors (19225045372).

21133304324 is a wasteful number, since it uses less digits than its factorization.

21133304324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154187 (or 154185 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21133304324 its reverse (42340333112), we get a palindrome (63473637436).

The spelling of 21133304324 in words is "twenty-one billion, one hundred thirty-three million, three hundred four thousand, three hundred twenty-four".