19446378468 has 48 divisors (see below), whose sum is σ = 51652048896. Its totient is φ = 5636630560.

The previous prime is 19446378449. The next prime is 19446378481. The reversal of 19446378468 is 86487364491.

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, 3199596 + ... + 3205667.

It is an arithmetic number, because the mean of its divisors is an integer number (1076084352).

Almost surely, 2^19446378468 is an apocalyptic number.

It is an amenable number.

19446378468 is an abundant number, since it is smaller than the sum of its proper divisors (32205670428).

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

19446378468 is a wasteful number, since it uses less digits than its factorization.

19446378468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405304 (or 6405302 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The spelling of 19446378468 in words is "nineteen billion, four hundred forty-six million, three hundred seventy-eight thousand, four hundred sixty-eight".