19729475916 has 48 divisors (see below), whose sum is σ = 46470068064. Its totient is φ = 6514471936.

The previous prime is 19729475897. The next prime is 19729475921. The reversal of 19729475916 is 61957492791.

It is a self number, because there is not a number n which added to its sum of digits gives 19729475916.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193006 + ... + 3199178.

It is an arithmetic number, because the mean of its divisors is an integer number (968126418).

Almost surely, 2^19729475916 is an apocalyptic number.

It is an amenable number.

19729475916 is an abundant number, since it is smaller than the sum of its proper divisors (26740592148).

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

19729475916 is a wasteful number, since it uses less digits than its factorization.

19729475916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650 (or 8648 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The spelling of 19729475916 in words is "nineteen billion, seven hundred twenty-nine million, four hundred seventy-five thousand, nine hundred sixteen".