18080899 has 2 divisors, whose sum is σ = 18080900. Its totient is φ = 18080898.

The previous prime is 18080869. The next prime is 18080903. The reversal of 18080899 is 99808081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18080899 - 2¹³ = 18072707 is a prime.

It is not a weakly prime, because it can be changed into another prime (18080869) 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, 9040449 + 9040450.

It is an arithmetic number, because the mean of its divisors is an integer number (9040450).

Almost surely, 2^18080899 is an apocalyptic number.

18080899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080899 is an equidigital number, since it uses as much as digits as its factorization.

18080899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 18080899 is about 4252.1640372874. The cubic root of 18080899 is about 262.4661737214.

The spelling of 18080899 in words is "eighteen million, eighty thousand, eight hundred ninety-nine".