19191019192 has 32 divisors (see below), whose sum is σ = 36616718880. Its totient is φ = 9426936960.

The previous prime is 19191019189. The next prime is 19191019201. The reversal of 19191019192 is 29191019191.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393213 + ... + 439315.

It is an arithmetic number, because the mean of its divisors is an integer number (1144272465).

Almost surely, 2^19191019192 is an apocalyptic number.

It is an amenable number.

19191019192 is a deficient number, since it is larger than the sum of its proper divisors (17425699688).

19191019192 is a wasteful number, since it uses less digits than its factorization.

19191019192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47023 (or 47019 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 43.

Subtracting 19191019192 from its reverse (29191019191), we obtain a palindrome (9999999999).

The spelling of 19191019192 in words is "nineteen billion, one hundred ninety-one million, nineteen thousand, one hundred ninety-two".