18085699 has 2 divisors, whose sum is σ = 18085700. Its totient is φ = 18085698.

The previous prime is 18085687. The next prime is 18085709. The reversal of 18085699 is 99658081.

It is a strong prime.

It is an emirp because it is prime and its reverse (99658081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18085699 - 2¹¹ = 18083651 is a prime.

It is not a weakly prime, because it can be changed into another prime (18085609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9042849 + 9042850.

It is an arithmetic number, because the mean of its divisors is an integer number (9042850).

Almost surely, 2^18085699 is an apocalyptic number.

18085699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18085699 is an equidigital number, since it uses as much as digits as its factorization.

18085699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 18085699 is about 4252.7284183216. The cubic root of 18085699 is about 262.4893976065.

The spelling of 18085699 in words is "eighteen million, eighty-five thousand, six hundred ninety-nine".