20441115563 has 4 divisors (see below), whose sum is σ = 22299398808. Its totient is φ = 18582832320.

The previous prime is 20441115547. The next prime is 20441115589. The reversal of 20441115563 is 36551114402.

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

It is a cyclic number.

It is not a de Polignac number, because 20441115563 - 2⁴ = 20441115547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20441115593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929141606 + ... + 929141627.

It is an arithmetic number, because the mean of its divisors is an integer number (5574849702).

Almost surely, 2^20441115563 is an apocalyptic number.

20441115563 is a deficient number, since it is larger than the sum of its proper divisors (1858283245).

20441115563 is a wasteful number, since it uses less digits than its factorization.

20441115563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858283244.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 20441115563 its reverse (36551114402), we get a palindrome (56992229965).

The spelling of 20441115563 in words is "twenty billion, four hundred forty-one million, one hundred fifteen thousand, five hundred sixty-three".