19188199044 has 72 divisors (see below), whose sum is σ = 57344064960. Its totient is φ = 5293294272.

The previous prime is 19188199027. The next prime is 19188199049. The reversal of 19188199044 is 44099188191.

It is not an unprimeable number, because it can be changed into a prime (19188199049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1305514 + ... + 1320129.

Almost surely, 2^19188199044 is an apocalyptic number.

19188199044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19188199044 is an abundant number, since it is smaller than the sum of its proper divisors (38155865916).

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

19188199044 is a wasteful number, since it uses less digits than its factorization.

19188199044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625689 (or 2625684 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 19188199044 in words is "nineteen billion, one hundred eighty-eight million, one hundred ninety-nine thousand, forty-four".