19478820755 has 8 divisors (see below), whose sum is σ = 24006330672. Its totient is φ = 15161892768.

The previous prime is 19478820719. The next prime is 19478820761. The reversal of 19478820755 is 55702887491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19478820755 - 2¹² = 19478816659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19478820755.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52645277 + ... + 52645646.

It is an arithmetic number, because the mean of its divisors is an integer number (3000791334).

Almost surely, 2^19478820755 is an apocalyptic number.

19478820755 is a deficient number, since it is larger than the sum of its proper divisors (4527509917).

19478820755 is a wasteful number, since it uses less digits than its factorization.

19478820755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105290965.

The product of its (nonzero) digits is 5644800, while the sum is 56.

The spelling of 19478820755 in words is "nineteen billion, four hundred seventy-eight million, eight hundred twenty thousand, seven hundred fifty-five".