18192918187 has 2 divisors, whose sum is σ = 18192918188. Its totient is φ = 18192918186.

The previous prime is 18192918131. The next prime is 18192918217. The reversal of 18192918187 is 78181929181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18192918187 - 2⁷ = 18192918059 is a prime.

It is not a weakly prime, because it can be changed into another prime (18192918127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9096459093 + 9096459094.

It is an arithmetic number, because the mean of its divisors is an integer number (9096459094).

Almost surely, 2^18192918187 is an apocalyptic number.

18192918187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18192918187 is an equidigital number, since it uses as much as digits as its factorization.

18192918187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 55.

The spelling of 18192918187 in words is "eighteen billion, one hundred ninety-two million, nine hundred eighteen thousand, one hundred eighty-seven".