19190020194 has 24 divisors (see below), whose sum is σ = 42463025280. Its totient is φ = 6260573688.

The previous prime is 19190020151. The next prime is 19190020207. The reversal of 19190020194 is 49102009191.

It is a super-2 number, since 2×19190020194² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11340774 + ... + 11342465.

It is an arithmetic number, because the mean of its divisors is an integer number (1769292720).

Almost surely, 2^19190020194 is an apocalyptic number.

19190020194 is an abundant number, since it is smaller than the sum of its proper divisors (23273005086).

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

19190020194 is a wasteful number, since it uses less digits than its factorization.

19190020194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22683294 (or 22683291 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 19190020194 in words is "nineteen billion, one hundred ninety million, twenty thousand, one hundred ninety-four".