18081983 has 2 divisors, whose sum is σ = 18081984. Its totient is φ = 18081982.

The previous prime is 18081967. The next prime is 18081991. The reversal of 18081983 is 38918081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18081983 - 2⁴ = 18081967 is a 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 (18081913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040991 + 9040992.

It is an arithmetic number, because the mean of its divisors is an integer number (9040992).

Almost surely, 2^18081983 is an apocalyptic number.

18081983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18081983 is an equidigital number, since it uses as much as digits as its factorization.

18081983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 18081983 is about 4252.2914998857. The cubic root of 18081983 is about 262.4714188081.

The spelling of 18081983 in words is "eighteen million, eighty-one thousand, nine hundred eighty-three".