19918076744 has 16 divisors (see below), whose sum is σ = 37435532400. Its totient is φ = 9935268112.

The previous prime is 19918076723. The next prime is 19918076747. The reversal of 19918076744 is 44767081991.

It is a self number, because there is not a number n which added to its sum of digits gives 19918076744.

It is not an unprimeable number, because it can be changed into a prime (19918076747) 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 3 ways as a sum of consecutive naturals, for example, 2967722 + ... + 2974425.

It is an arithmetic number, because the mean of its divisors is an integer number (2339720775).

Almost surely, 2^19918076744 is an apocalyptic number.

It is an amenable number.

19918076744 is a deficient number, since it is larger than the sum of its proper divisors (17517455656).

19918076744 is a wasteful number, since it uses less digits than its factorization.

19918076744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942572 (or 5942568 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 19918076744 in words is "nineteen billion, nine hundred eighteen million, seventy-six thousand, seven hundred forty-four".