19091919092 has 12 divisors (see below), whose sum is σ = 33425159040. Its totient is φ = 9541873656.

The previous prime is 19091919079. The next prime is 19091919109. The reversal of 19091919092 is 29091919091.

It is a self number, because there is not a number n which added to its sum of digits gives 19091919092.

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 3 ways as a sum of consecutive naturals, for example, 1010948 + ... + 1029659.

It is an arithmetic number, because the mean of its divisors is an integer number (2785429920).

Almost surely, 2^19091919092 is an apocalyptic number.

It is an amenable number.

19091919092 is a deficient number, since it is larger than the sum of its proper divisors (14333239948).

19091919092 is a wasteful number, since it uses less digits than its factorization.

19091919092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042950 (or 2042948 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 50.

Subtracting 19091919092 from its reverse (29091919091), we obtain a palindrome (9999999999).

The spelling of 19091919092 in words is "nineteen billion, ninety-one million, nine hundred nineteen thousand, ninety-two".