21224032315604 has 12 divisors (see below), whose sum is σ = 37178506075200. Its totient is φ = 10601602008408.

The previous prime is 21224032315531. The next prime is 21224032315663. The reversal of 21224032315604 is 40651323042212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603532764 + ... + 2603540915.

It is an arithmetic number, because the mean of its divisors is an integer number (3098208839600).

Almost surely, 2^{21224032315604} is an apocalyptic number.

It is an amenable number.

21224032315604 is a deficient number, since it is larger than the sum of its proper divisors (15954473759596).

21224032315604 is a wasteful number, since it uses less digits than its factorization.

21224032315604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207074702 (or 5207074700 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21224032315604 its reverse (40651323042212), we get a palindrome (61875355357816).

The spelling of 21224032315604 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, three hundred fifteen thousand, six hundred four".