21220324024 has 16 divisors (see below), whose sum is σ = 39822693120. Its totient is φ = 10600939200.

The previous prime is 21220324007. The next prime is 21220324033. The reversal of 21220324024 is 42042302212.

It is a junction number, because it is equal to n+sod(n) for n = 21220323986 and 21220324004.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1143069 + ... + 1161484.

It is an arithmetic number, because the mean of its divisors is an integer number (2488918320).

Almost surely, 2^21220324024 is an apocalyptic number.

It is an amenable number.

21220324024 is a deficient number, since it is larger than the sum of its proper divisors (18602369096).

21220324024 is a wasteful number, since it uses less digits than its factorization.

21220324024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305710 (or 2305706 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21220324024 its reverse (42042302212), we get a palindrome (63262626236).

The spelling of 21220324024 in words is "twenty-one billion, two hundred twenty million, three hundred twenty-four thousand, twenty-four".