19719305508 has 48 divisors (see below), whose sum is σ = 54398090880. Its totient is φ = 5439807744.

The previous prime is 19719305453. The next prime is 19719305513. The reversal of 19719305508 is 80550391791.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4045041 + ... + 4049912.

It is an arithmetic number, because the mean of its divisors is an integer number (1133293560).

Almost surely, 2^19719305508 is an apocalyptic number.

It is an amenable number.

19719305508 is an abundant number, since it is smaller than the sum of its proper divisors (34678785372).

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

19719305508 is a wasteful number, since it uses less digits than its factorization.

19719305508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8094996 (or 8094994 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 48.

The spelling of 19719305508 in words is "nineteen billion, seven hundred nineteen million, three hundred five thousand, five hundred eight".