19178949912 has 32 divisors (see below), whose sum is σ = 47951585280. Its totient is φ = 6392421920.

The previous prime is 19178949899. The next prime is 19178949919. The reversal of 19178949912 is 21994987191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19178949919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315337 + ... + 371207.

It is an arithmetic number, because the mean of its divisors is an integer number (1498487040).

Almost surely, 2^19178949912 is an apocalyptic number.

19178949912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19178949912 is an abundant number, since it is smaller than the sum of its proper divisors (28772635368).

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

19178949912 is a wasteful number, since it uses less digits than its factorization.

19178949912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70183 (or 70179 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 60.

The spelling of 19178949912 in words is "nineteen billion, one hundred seventy-eight million, nine hundred forty-nine thousand, nine hundred twelve".