20444004441 has 12 divisors (see below), whose sum is σ = 33748832832. Its totient is φ = 11682288216.

The previous prime is 20444004439. The next prime is 20444004443. The reversal of 20444004441 is 14440044402.

20444004441 = 27504² + 27505² + ... + 27530².

It is an interprime number because it is at equal distance from previous prime (20444004439) and next prime (20444004443).

It is not a de Polignac number, because 20444004441 - 2¹ = 20444004439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20444004443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162253941 + ... + 162254066.

It is an arithmetic number, because the mean of its divisors is an integer number (2812402736).

Almost surely, 2^20444004441 is an apocalyptic number.

20444004441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20444004441 is a deficient number, since it is larger than the sum of its proper divisors (13304828391).

20444004441 is a wasteful number, since it uses less digits than its factorization.

20444004441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324508020 (or 324508017 counting only the distinct ones).

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

Adding to 20444004441 its reverse (14440044402), we get a palindrome (34884048843).

The spelling of 20444004441 in words is "twenty billion, four hundred forty-four million, four thousand, four hundred forty-one".