19199918144 has 28 divisors (see below), whose sum is σ = 41563460688. Its totient is φ = 8727235200.

The previous prime is 19199918141. The next prime is 19199918161. The reversal of 19199918144 is 44181999191.

It is a super-3 number, since 3×19199918144³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19199918144.

It is not an unprimeable number, because it can be changed into a prime (19199918141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13635602 + ... + 13637009.

Almost surely, 2^19199918144 is an apocalyptic number.

It is an amenable number.

19199918144 is an abundant number, since it is smaller than the sum of its proper divisors (22363542544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19199918144 is a wasteful number, since it uses less digits than its factorization.

19199918144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272634 (or 27272624 counting only the distinct ones).

The product of its digits is 839808, while the sum is 56.

The spelling of 19199918144 in words is "nineteen billion, one hundred ninety-nine million, nine hundred eighteen thousand, one hundred forty-four".