18399193027 has 4 divisors (see below), whose sum is σ = 18411518160. Its totient is φ = 18386867896.

The previous prime is 18399192997. The next prime is 18399193031. The reversal of 18399193027 is 72039199381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18399193027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18399193097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6160327 + ... + 6163312.

It is an arithmetic number, because the mean of its divisors is an integer number (4602879540).

Almost surely, 2^18399193027 is an apocalyptic number.

18399193027 is a deficient number, since it is larger than the sum of its proper divisors (12325133).

18399193027 is a wasteful number, since it uses less digits than its factorization.

18399193027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12325132.

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 18399193027 in words is "eighteen billion, three hundred ninety-nine million, one hundred ninety-three thousand, twenty-seven".