18080999 has 2 divisors, whose sum is σ = 18081000. Its totient is φ = 18080998.

The previous prime is 18080977. The next prime is 18081023. The reversal of 18080999 is 99908081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18080999 - 2⁸ = 18080743 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18080939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040499 + 9040500.

It is an arithmetic number, because the mean of its divisors is an integer number (9040500).

Almost surely, 2^18080999 is an apocalyptic number.

18080999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080999 is an equidigital number, since it uses as much as digits as its factorization.

18080999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 18080999 is about 4252.1757959896. The cubic root of 18080999 is about 262.4666575942.

The spelling of 18080999 in words is "eighteen million, eighty thousand, nine hundred ninety-nine".