19404000005 has 16 divisors (see below), whose sum is σ = 26550995184. Its totient is φ = 13486218240.

The previous prime is 19403999999. The next prime is 19404000017. The reversal of 19404000005 is 50000040491.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1181569 + 19402818436 = 1087^2 + 139294^2 .

It is not a de Polignac number, because 19404000005 - 2⁶ = 19403999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8778986 + ... + 8781195.

It is an arithmetic number, because the mean of its divisors is an integer number (1659437199).

Almost surely, 2^19404000005 is an apocalyptic number.

It is an amenable number.

19404000005 is a deficient number, since it is larger than the sum of its proper divisors (7146995179).

19404000005 is a wasteful number, since it uses less digits than its factorization.

19404000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17560216.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 19404000005 its reverse (50000040491), we get a palindrome (69404040496).

The spelling of 19404000005 in words is "nineteen billion, four hundred four million, five", and thus it is an aban number.