19118212185 has 16 divisors (see below), whose sum is σ = 30597546816. Its totient is φ = 10193577408.

The previous prime is 19118212171. The next prime is 19118212193. The reversal of 19118212185 is 58121281191.

It is not a de Polignac number, because 19118212185 - 2⁵ = 19118212153 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118159 + ... + 228468.

It is an arithmetic number, because the mean of its divisors is an integer number (1912346676).

Almost surely, 2^19118212185 is an apocalyptic number.

19118212185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19118212185 is a deficient number, since it is larger than the sum of its proper divisors (11479334631).

19118212185 is a wasteful number, since it uses less digits than its factorization.

19118212185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350312.

The product of its digits is 11520, while the sum is 39.

The spelling of 19118212185 in words is "nineteen billion, one hundred eighteen million, two hundred twelve thousand, one hundred eighty-five".