19090919111 has 12 divisors (see below), whose sum is σ = 21075898200. Its totient is φ = 17279568240.

The previous prime is 19090919083. The next prime is 19090919167. The reversal of 19090919111 is 11191909091.

It is a happy number.

It is not a de Polignac number, because 19090919111 - 2¹⁰ = 19090918087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19090919171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316781 + ... + 372198.

It is an arithmetic number, because the mean of its divisors is an integer number (1756324850).

Almost surely, 2^19090919111 is an apocalyptic number.

19090919111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19090919111 is a deficient number, since it is larger than the sum of its proper divisors (1984979089).

19090919111 is a wasteful number, since it uses less digits than its factorization.

19090919111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689230 (or 689219 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 19090919111 in words is "nineteen billion, ninety million, nine hundred nineteen thousand, one hundred eleven".