19045947648 has 576 divisors, whose sum is σ = 65931264000. Its totient is φ = 4746608640.

The previous prime is 19045947629. The next prime is 19045947703. The reversal of 19045947648 is 84674954091.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 127825078 + ... + 127825226.

It is an arithmetic number, because the mean of its divisors is an integer number (114464000).

Almost surely, 2^19045947648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19045947648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32965632000).

19045947648 is an abundant number, since it is smaller than the sum of its proper divisors (46885316352).

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

19045947648 is a wasteful number, since it uses less digits than its factorization.

19045947648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 19045947648 in words is "nineteen billion, forty-five million, nine hundred forty-seven thousand, six hundred forty-eight".