19138842108 has 48 divisors (see below), whose sum is σ = 49696809120. Its totient is φ = 6369638400.

The previous prime is 19138842083. The next prime is 19138842157. The reversal of 19138842108 is 80124883191.

19138842108 is a `hidden beast` number, since 191 + 38 + 8 + 421 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69003 + ... + 207458.

It is an arithmetic number, because the mean of its divisors is an integer number (1035350190).

Almost surely, 2^19138842108 is an apocalyptic number.

19138842108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19138842108 is an abundant number, since it is smaller than the sum of its proper divisors (30557967012).

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

19138842108 is a wasteful number, since it uses less digits than its factorization.

19138842108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277115 (or 277107 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 19138842108 in words is "nineteen billion, one hundred thirty-eight million, eight hundred forty-two thousand, one hundred eight".