19118212144 has 20 divisors (see below), whose sum is σ = 37048270624. Its totient is φ = 9557368128.

The previous prime is 19118212117. The next prime is 19118212153. The reversal of 19118212144 is 44121281191.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15447 + ... + 196150.

Almost surely, 2^19118212144 is an apocalyptic number.

It is an amenable number.

19118212144 is a deficient number, since it is larger than the sum of its proper divisors (17930058480).

19118212144 is a wasteful number, since it uses less digits than its factorization.

19118212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217252 (or 217246 counting only the distinct ones).

The product of its digits is 4608, while the sum is 34.

The spelling of 19118212144 in words is "nineteen billion, one hundred eighteen million, two hundred twelve thousand, one hundred forty-four".