19138965984 has 96 divisors (see below), whose sum is σ = 55849409280. Its totient is φ = 6376521600.

The previous prime is 19138965941. The next prime is 19138965991. The reversal of 19138965984 is 48956983191.

19138965984 is a `hidden beast` number, since 1 + 9 + 1 + 38 + 9 + 6 + 598 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 2338219 + ... + 2346389.

It is an arithmetic number, because the mean of its divisors is an integer number (581764680).

Almost surely, 2^19138965984 is an apocalyptic number.

It is an amenable number.

19138965984 is an abundant number, since it is smaller than the sum of its proper divisors (36710443296).

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

19138965984 is a wasteful number, since it uses less digits than its factorization.

19138965984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10901 (or 10887 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 19138965984 in words is "nineteen billion, one hundred thirty-eight million, nine hundred sixty-five thousand, nine hundred eighty-four".