18189107 has 2 divisors, whose sum is σ = 18189108. Its totient is φ = 18189106.

The previous prime is 18189103. The next prime is 18189109. The reversal of 18189107 is 70198181.

It is a strong prime.

It is an emirp because it is prime and its reverse (70198181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18189107 - 2² = 18189103 is a prime.

It is a super-2 number, since 2×18189107² = 661687226914898, which contains 22 as substring.

Together with 18189109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18189103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9094553 + 9094554.

It is an arithmetic number, because the mean of its divisors is an integer number (9094554).

Almost surely, 2^18189107 is an apocalyptic number.

18189107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18189107 is an equidigital number, since it uses as much as digits as its factorization.

18189107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 18189107 is about 4264.8689311631. The cubic root of 18189107 is about 262.9887227884.

The spelling of 18189107 in words is "eighteen million, one hundred eighty-nine thousand, one hundred seven".