205119000019 has 4 divisors (see below), whose sum is σ = 205677907744. Its totient is φ = 204560092296.

The previous prime is 205119000013. The next prime is 205119000049. The reversal of 205119000019 is 910000911502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910000911502 = 2 ⋅455000455751.

It is a cyclic number.

It is not a de Polignac number, because 205119000019 - 2³ = 205119000011 is a prime.

It is a super-2 number, since 2×205119000019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205119000011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279453312 + ... + 279454045.

It is an arithmetic number, because the mean of its divisors is an integer number (51419476936).

Almost surely, 2^205119000019 is an apocalyptic number.

205119000019 is a deficient number, since it is larger than the sum of its proper divisors (558907725).

205119000019 is an equidigital number, since it uses as much as digits as its factorization.

205119000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558907724.

The product of its (nonzero) digits is 810, while the sum is 28.

The spelling of 205119000019 in words is "two hundred five billion, one hundred nineteen million, nineteen", and thus it is an aban number.