18479196091 has 4 divisors (see below), whose sum is σ = 18614080872. Its totient is φ = 18344311312.

The previous prime is 18479196083. The next prime is 18479196119. The reversal of 18479196091 is 19069197481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18479196091 - 2³ = 18479196083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18479196011) 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 3 ways as a sum of consecutive naturals, for example, 67442185 + ... + 67442458.

It is an arithmetic number, because the mean of its divisors is an integer number (4653520218).

Almost surely, 2^18479196091 is an apocalyptic number.

18479196091 is a deficient number, since it is larger than the sum of its proper divisors (134884781).

18479196091 is a wasteful number, since it uses less digits than its factorization.

18479196091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134884780.

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 18479196091 in words is "eighteen billion, four hundred seventy-nine million, one hundred ninety-six thousand, ninety-one".