21321034024 has 64 divisors (see below), whose sum is σ = 42901669440. Its totient is φ = 9897937920.

The previous prime is 21321034013. The next prime is 21321034037. The reversal of 21321034024 is 42043012312.

It is a junction number, because it is equal to n+sod(n) for n = 21321033986 and 21321034004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13217442 + ... + 13219054.

It is an arithmetic number, because the mean of its divisors is an integer number (670338585).

Almost surely, 2^21321034024 is an apocalyptic number.

It is an amenable number.

21321034024 is an abundant number, since it is smaller than the sum of its proper divisors (21580635416).

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

21321034024 is a wasteful number, since it uses less digits than its factorization.

21321034024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890 (or 2886 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21321034024 its reverse (42043012312), we get a palindrome (63364046336).

The spelling of 21321034024 in words is "twenty-one billion, three hundred twenty-one million, thirty-four thousand, twenty-four".