19919216716 has 24 divisors (see below), whose sum is σ = 39956667296. Its totient is φ = 8511471360.

The previous prime is 19919216699. The next prime is 19919216719. The reversal of 19919216716 is 61761291991.

It is not an unprimeable number, because it can be changed into a prime (19919216719) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1046055 + ... + 1064926.

Almost surely, 2^19919216716 is an apocalyptic number.

It is an amenable number.

19919216716 is an abundant number, since it is smaller than the sum of its proper divisors (20037450580).

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

19919216716 is a wasteful number, since it uses less digits than its factorization.

19919216716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111329 (or 2111327 counting only the distinct ones).

The product of its digits is 367416, while the sum is 52.

The spelling of 19919216716 in words is "nineteen billion, nine hundred nineteen million, two hundred sixteen thousand, seven hundred sixteen".