19147127489 has 16 divisors (see below), whose sum is σ = 23448797568. Its totient is φ = 15260312832.

The previous prime is 19147127453. The next prime is 19147127501. The reversal of 19147127489 is 98472174191.

It is a cyclic number.

It is not a de Polignac number, because 19147127489 - 2¹⁶ = 19147061953 is a prime.

It is a super-2 number, since 2×19147127489² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19147127489.

It is not an unprimeable number, because it can be changed into a prime (19147127429) 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 15 ways as a sum of consecutive naturals, for example, 959402 + ... + 979155.

It is an arithmetic number, because the mean of its divisors is an integer number (1465549848).

Almost surely, 2^19147127489 is an apocalyptic number.

It is an amenable number.

19147127489 is a deficient number, since it is larger than the sum of its proper divisors (4301670079).

19147127489 is a wasteful number, since it uses less digits than its factorization.

19147127489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938664.

The product of its digits is 1016064, while the sum is 53.

The spelling of 19147127489 in words is "nineteen billion, one hundred forty-seven million, one hundred twenty-seven thousand, four hundred eighty-nine".