18040907 has 2 divisors, whose sum is σ = 18040908. Its totient is φ = 18040906.

The previous prime is 18040879. The next prime is 18040909. The reversal of 18040907 is 70904081.

It is a strong prime.

It is an emirp because it is prime and its reverse (70904081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18040907 - 2¹⁰ = 18039883 is a prime.

Together with 18040909, it forms a pair of twin primes.

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 18040907.

It is not a weakly prime, because it can be changed into another prime (18040909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020453 + 9020454.

It is an arithmetic number, because the mean of its divisors is an integer number (9020454).

Almost surely, 2^18040907 is an apocalyptic number.

18040907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18040907 is an equidigital number, since it uses as much as digits as its factorization.

18040907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18040907 is about 4247.4588873820. The cubic root of 18040907 is about 262.2725200831.

Adding to 18040907 its reverse (70904081), we get a palindrome (88944988).

The spelling of 18040907 in words is "eighteen million, forty thousand, nine hundred seven".