18268807 has 2 divisors, whose sum is σ = 18268808. Its totient is φ = 18268806.

The previous prime is 18268799. The next prime is 18268849. The reversal of 18268807 is 70886281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18268807 - 2³ = 18268799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18268807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18268307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134403 + 9134404.

It is an arithmetic number, because the mean of its divisors is an integer number (9134404).

Almost surely, 2^18268807 is an apocalyptic number.

18268807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18268807 is an equidigital number, since it uses as much as digits as its factorization.

18268807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 18268807 is about 4274.2024987125. The cubic root of 18268807 is about 263.3722794860.

The spelling of 18268807 in words is "eighteen million, two hundred sixty-eight thousand, eight hundred seven".