18454023187 has 2 divisors, whose sum is σ = 18454023188. Its totient is φ = 18454023186.

The previous prime is 18454023169. The next prime is 18454023191. The reversal of 18454023187 is 78132045481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18454023187 - 2¹¹ = 18454021139 is a prime.

It is not a weakly prime, because it can be changed into another prime (18454023157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227011593 + 9227011594.

It is an arithmetic number, because the mean of its divisors is an integer number (9227011594).

Almost surely, 2^18454023187 is an apocalyptic number.

18454023187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18454023187 is an equidigital number, since it uses as much as digits as its factorization.

18454023187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 18454023187 in words is "eighteen billion, four hundred fifty-four million, twenty-three thousand, one hundred eighty-seven".