20444213441 has 4 divisors (see below), whose sum is σ = 20444708292. Its totient is φ = 20443718592.

The previous prime is 20444213437. The next prime is 20444213483. The reversal of 20444213441 is 14431244402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2171932816 + 18272280625 = 46604^2 + 135175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444213441 - 2² = 20444213437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20444212441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179180 + ... + 270173.

It is an arithmetic number, because the mean of its divisors is an integer number (5111177073).

Almost surely, 2^20444213441 is an apocalyptic number.

It is an amenable number.

20444213441 is a deficient number, since it is larger than the sum of its proper divisors (494851).

20444213441 is an equidigital number, since it uses as much as digits as its factorization.

20444213441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494850.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20444213441 its reverse (14431244402), we get a palindrome (34875457843).

The spelling of 20444213441 in words is "twenty billion, four hundred forty-four million, two hundred thirteen thousand, four hundred forty-one".