19194272019 has 24 divisors (see below), whose sum is σ = 29862421680. Its totient is φ = 11810014272.

The previous prime is 19194271981. The next prime is 19194272099. The reversal of 19194272019 is 91027249191.

It is a happy number.

19194272019 is a `hidden beast` number, since 1 + 9 + 19 + 427 + 201 + 9 = 666.

It is not a de Polignac number, because 19194272019 - 2⁹ = 19194271507 is a prime.

It is a super-2 number, since 2×19194272019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19194272099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1441012 + ... + 1454270.

It is an arithmetic number, because the mean of its divisors is an integer number (1244267570).

Almost surely, 2^19194272019 is an apocalyptic number.

19194272019 is a deficient number, since it is larger than the sum of its proper divisors (10668149661).

19194272019 is a wasteful number, since it uses less digits than its factorization.

19194272019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651 (or 25648 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 19194272019 in words is "nineteen billion, one hundred ninety-four million, two hundred seventy-two thousand, nineteen".