19138022142 has 16 divisors (see below), whose sum is σ = 39595908240. Its totient is φ = 6159363392.

The previous prime is 19138022077. The next prime is 19138022159. The reversal of 19138022142 is 24122083191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54994143 + ... + 54994490.

It is an arithmetic number, because the mean of its divisors is an integer number (2474744265).

Almost surely, 2^19138022142 is an apocalyptic number.

19138022142 is an abundant number, since it is smaller than the sum of its proper divisors (20457886098).

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

19138022142 is a wasteful number, since it uses less digits than its factorization.

19138022142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109988667.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 19138022142 in words is "nineteen billion, one hundred thirty-eight million, twenty-two thousand, one hundred forty-two".