20024443221 has 16 divisors (see below), whose sum is σ = 27179444928. Its totient is φ = 13110220800.

The previous prime is 20024443217. The next prime is 20024443249. The reversal of 20024443221 is 12234442002.

It is not a de Polignac number, because 20024443221 - 2² = 20024443217 is a prime.

It is a super-2 number, since 2×20024443221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20024443191 and 20024443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024443291) 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, 31950 + ... + 202656.

It is an arithmetic number, because the mean of its divisors is an integer number (1698715308).

Almost surely, 2^20024443221 is an apocalyptic number.

It is an amenable number.

20024443221 is a deficient number, since it is larger than the sum of its proper divisors (7155001707).

20024443221 is a wasteful number, since it uses less digits than its factorization.

20024443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171412.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20024443221 its reverse (12234442002), we get a palindrome (32258885223).

The spelling of 20024443221 in words is "twenty billion, twenty-four million, four hundred forty-three thousand, two hundred twenty-one".