19191100109192 has 32 divisors (see below), whose sum is σ = 39481427738880. Its totient is φ = 8672804036160.

The previous prime is 19191100109117. The next prime is 19191100109201. The reversal of 19191100109192 is 29190100119191.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 7 ways as a sum of consecutive naturals, for example, 630275768 + ... + 630306215.

It is an arithmetic number, because the mean of its divisors is an integer number (1233794616840).

Almost surely, 2^{19191100109192} is an apocalyptic number.

It is an amenable number.

19191100109192 is an abundant number, since it is smaller than the sum of its proper divisors (20290327629688).

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

19191100109192 is a wasteful number, since it uses less digits than its factorization.

19191100109192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260582173 (or 1260582169 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 44.

Multiplying 19191100109192 by its sum of digits (44), we get a palindrome (844408404804448).

Subtracting 19191100109192 from its reverse (29190100119191), we obtain a palindrome (9999000009999).

The spelling of 19191100109192 in words is "nineteen trillion, one hundred ninety-one billion, one hundred million, one hundred nine thousand, one hundred ninety-two".