19147287449 has 8 divisors (see below), whose sum is σ = 20165906880. Its totient is φ = 18129754800.

The previous prime is 19147287443. The next prime is 19147287473. The reversal of 19147287449 is 94478274191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19147287449 - 2⁸ = 19147287193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19147287394 and 19147287403.

It is not an unprimeable number, because it can be changed into a prime (19147287443) 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 7 ways as a sum of consecutive naturals, for example, 235397 + ... + 306114.

It is an arithmetic number, because the mean of its divisors is an integer number (2520738360).

Almost surely, 2^19147287449 is an apocalyptic number.

19147287449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19147287449 is a deficient number, since it is larger than the sum of its proper divisors (1018619431).

19147287449 is a wasteful number, since it uses less digits than its factorization.

19147287449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543391.

The product of its digits is 4064256, while the sum is 56.

The spelling of 19147287449 in words is "nineteen billion, one hundred forty-seven million, two hundred eighty-seven thousand, four hundred forty-nine".