19608557872 has 20 divisors (see below), whose sum is σ = 39301636320. Its totient is φ = 9466200128.

The previous prime is 19608557867. The next prime is 19608557921. The reversal of 19608557872 is 27875580691.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21129448 + ... + 21130375.

It is an arithmetic number, because the mean of its divisors is an integer number (1965081816).

Almost surely, 2^19608557872 is an apocalyptic number.

It is an amenable number.

19608557872 is an abundant number, since it is smaller than the sum of its proper divisors (19693078448).

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

19608557872 is a wasteful number, since it uses less digits than its factorization.

19608557872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42259860 (or 42259854 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 19608557872 in words is "nineteen billion, six hundred eight million, five hundred fifty-seven thousand, eight hundred seventy-two".