20104444013 has 16 divisors (see below), whose sum is σ = 20697659136. Its totient is φ = 19516392960.

The previous prime is 20104443991. The next prime is 20104444021. The reversal of 20104444013 is 31044440102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20104444013 - 2³² = 15809476717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20104444013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104444513) 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, 8435420 + ... + 8437802.

It is an arithmetic number, because the mean of its divisors is an integer number (1293603696).

Almost surely, 2^20104444013 is an apocalyptic number.

It is an amenable number.

20104444013 is a deficient number, since it is larger than the sum of its proper divisors (593215123).

20104444013 is a wasteful number, since it uses less digits than its factorization.

20104444013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20104444013 its reverse (31044440102), we get a palindrome (51148884115).

The spelling of 20104444013 in words is "twenty billion, one hundred four million, four hundred forty-four thousand, thirteen".