18068893 has 2 divisors, whose sum is σ = 18068894. Its totient is φ = 18068892.

The previous prime is 18068891. The next prime is 18068923. The reversal of 18068893 is 39886081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15578809 + 2490084 = 3947^2 + 1578^2 .

It is a cyclic number.

It is not a de Polignac number, because 18068893 - 2¹ = 18068891 is a prime.

Together with 18068891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18068891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9034446 + 9034447.

It is an arithmetic number, because the mean of its divisors is an integer number (9034447).

Almost surely, 2^18068893 is an apocalyptic number.

It is an amenable number.

18068893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18068893 is an equidigital number, since it uses as much as digits as its factorization.

18068893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18068893 is about 4250.7520511081. The cubic root of 18068893 is about 262.4080669754.

The spelling of 18068893 in words is "eighteen million, sixty-eight thousand, eight hundred ninety-three".