24223020221 has 16 divisors (see below), whose sum is σ = 24598457520. Its totient is φ = 23851376640.

The previous prime is 24223020209. The next prime is 24223020247. The reversal of 24223020221 is 12202032242.

It can be written as a sum of positive squares in 8 ways, for example, as 17526052996 + 6696967225 = 132386^2 + 81835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24223020221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 24223020193 and 24223020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24223020721) 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, 9006845 + ... + 9009533.

It is an arithmetic number, because the mean of its divisors is an integer number (1537403595).

Almost surely, 2^24223020221 is an apocalyptic number.

It is an amenable number.

24223020221 is a deficient number, since it is larger than the sum of its proper divisors (375437299).

24223020221 is a wasteful number, since it uses less digits than its factorization.

24223020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 24223020221 its reverse (12202032242), we get a palindrome (36425052463).

The spelling of 24223020221 in words is "twenty-four billion, two hundred twenty-three million, twenty thousand, two hundred twenty-one".