19604543819 has 6 divisors (see below), whose sum is σ = 22805285724. Its totient is φ = 16803894660.

The previous prime is 19604543801. The next prime is 19604543851. The reversal of 19604543819 is 91834540691.

It is not a de Polignac number, because 19604543819 - 2²⁴ = 19587766603 is a prime.

It is a super-2 number, since 2×19604543819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19604543219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200046317 + ... + 200046414.

It is an arithmetic number, because the mean of its divisors is an integer number (3800880954).

Almost surely, 2^19604543819 is an apocalyptic number.

19604543819 is a deficient number, since it is larger than the sum of its proper divisors (3200741905).

19604543819 is an equidigital number, since it uses as much as digits as its factorization.

19604543819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400092745 (or 400092738 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 19604543819 in words is "nineteen billion, six hundred four million, five hundred forty-three thousand, eight hundred nineteen".