18156107 has 2 divisors, whose sum is σ = 18156108. Its totient is φ = 18156106.

The previous prime is 18156091. The next prime is 18156133. The reversal of 18156107 is 70165181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18156107 - 2⁴ = 18156091 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18156107.

It is not a weakly prime, because it can be changed into another prime (18156137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9078053 + 9078054.

It is an arithmetic number, because the mean of its divisors is an integer number (9078054).

Almost surely, 2^18156107 is an apocalyptic number.

18156107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18156107 is an equidigital number, since it uses as much as digits as its factorization.

18156107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 18156107 is about 4260.9983571928. The cubic root of 18156107 is about 262.8295820893.

The spelling of 18156107 in words is "eighteen million, one hundred fifty-six thousand, one hundred seven".