19197787147 has 16 divisors (see below), whose sum is σ = 24386510592. Its totient is φ = 14677060320.

The previous prime is 19197787139. The next prime is 19197787163. The reversal of 19197787147 is 74178779191.

It is a cyclic number.

It is not a de Polignac number, because 19197787147 - 2³ = 19197787139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19197787117) 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, 2348013 + ... + 2356174.

It is an arithmetic number, because the mean of its divisors is an integer number (1524156912).

Almost surely, 2^19197787147 is an apocalyptic number.

19197787147 is a deficient number, since it is larger than the sum of its proper divisors (5188723445).

19197787147 is a wasteful number, since it uses less digits than its factorization.

19197787147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4704258.

The product of its digits is 6223392, while the sum is 61.

The spelling of 19197787147 in words is "nineteen billion, one hundred ninety-seven million, seven hundred eighty-seven thousand, one hundred forty-seven".