18473030187 has 4 divisors (see below), whose sum is σ = 24630706920. Its totient is φ = 12315353456.

The previous prime is 18473030171. The next prime is 18473030227. The reversal of 18473030187 is 78103037481.

It is a happy number.

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 18473030187 - 2⁴ = 18473030171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18473030137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078838362 + ... + 3078838367.

It is an arithmetic number, because the mean of its divisors is an integer number (6157676730).

Almost surely, 2^18473030187 is an apocalyptic number.

18473030187 is a deficient number, since it is larger than the sum of its proper divisors (6157676733).

18473030187 is an equidigital number, since it uses as much as digits as its factorization.

18473030187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157676732.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 18473030187 in words is "eighteen billion, four hundred seventy-three million, thirty thousand, one hundred eighty-seven".