21002332324 has 48 divisors (see below), whose sum is σ = 38637244800. Its totient is φ = 9976167936.

The previous prime is 21002332289. The next prime is 21002332327. The reversal of 21002332324 is 42323320012.

It is a junction number, because it is equal to n+sod(n) for n = 21002332295 and 21002332304.

It is not an unprimeable number, because it can be changed into a prime (21002332327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816249 + ... + 1827775.

It is an arithmetic number, because the mean of its divisors is an integer number (804942600).

Almost surely, 2^21002332324 is an apocalyptic number.

It is an amenable number.

21002332324 is a deficient number, since it is larger than the sum of its proper divisors (17634912476).

21002332324 is a wasteful number, since it uses less digits than its factorization.

21002332324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812 (or 11810 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21002332324 its reverse (42323320012), we get a palindrome (63325652336).

The spelling of 21002332324 in words is "twenty-one billion, two million, three hundred thirty-two thousand, three hundred twenty-four".