19196518121 has 8 divisors (see below), whose sum is σ = 22043848800. Its totient is φ = 16532886240.

The previous prime is 19196518097. The next prime is 19196518123. The reversal of 19196518121 is 12181569191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19196518121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19196518123) by changing a digit.

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, 45924476 + ... + 45924893.

It is an arithmetic number, because the mean of its divisors is an integer number (2755481100).

Almost surely, 2^19196518121 is an apocalyptic number.

19196518121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19196518121 is a deficient number, since it is larger than the sum of its proper divisors (2847330679).

19196518121 is a wasteful number, since it uses less digits than its factorization.

19196518121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91849399.

The product of its digits is 38880, while the sum is 44.

The spelling of 19196518121 in words is "nineteen billion, one hundred ninety-six million, five hundred eighteen thousand, one hundred twenty-one".