19009846449 has 128 divisors (see below), whose sum is σ = 32774860800. Its totient is φ = 10867348800.

The previous prime is 19009846441. The next prime is 19009846481. The reversal of 19009846449 is 94464890091.

It is a happy number.

19009846449 is a `hidden beast` number, since 1 + 90 + 0 + 98 + 464 + 4 + 9 = 666.

It is not a de Polignac number, because 19009846449 - 2³ = 19009846441 is a prime.

It is a super-2 number, since 2×19009846449² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19009846395 and 19009846404.

It is not an unprimeable number, because it can be changed into a prime (19009846441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 90093954 + ... + 90094164.

It is an arithmetic number, because the mean of its divisors is an integer number (256053600).

Almost surely, 2^19009846449 is an apocalyptic number.

It is an amenable number.

19009846449 is a deficient number, since it is larger than the sum of its proper divisors (13765014351).

19009846449 is a wasteful number, since it uses less digits than its factorization.

19009846449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 19009846449 in words is "nineteen billion, nine million, eight hundred forty-six thousand, four hundred forty-nine".