20024444421 has 24 divisors (see below), whose sum is σ = 29114531160. Its totient is φ = 13262054400.

The previous prime is 20024444369. The next prime is 20024444443. The reversal of 20024444421 is 12444442002.

It can be written as a sum of positive squares in 4 ways, for example, as 5039012196 + 14985432225 = 70986^2 + 122415^2 .

It is not a de Polignac number, because 20024444421 - 2²⁹ = 19487573509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024444021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 902185 + ... + 924113.

It is an arithmetic number, because the mean of its divisors is an integer number (1213105465).

Almost surely, 2^20024444421 is an apocalyptic number.

It is an amenable number.

20024444421 is a deficient number, since it is larger than the sum of its proper divisors (9090086739).

20024444421 is a wasteful number, since it uses less digits than its factorization.

20024444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22597 (or 22594 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 20024444421 its reverse (12444442002), we get a palindrome (32468886423).

The spelling of 20024444421 in words is "twenty billion, twenty-four million, four hundred forty-four thousand, four hundred twenty-one".