18054889 has 2 divisors, whose sum is σ = 18054890. Its totient is φ = 18054888.

The previous prime is 18054887. The next prime is 18054893. The reversal of 18054889 is 98845081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13749264 + 4305625 = 3708^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 18054889 - 2¹ = 18054887 is a prime.

Together with 18054887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18054887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027444 + 9027445.

It is an arithmetic number, because the mean of its divisors is an integer number (9027445).

Almost surely, 2^18054889 is an apocalyptic number.

It is an amenable number.

18054889 is a deficient number, since it is larger than the sum of its proper divisors (1).

18054889 is an equidigital number, since it uses as much as digits as its factorization.

18054889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 18054889 is about 4249.1044938904. The cubic root of 18054889 is about 262.3402577607.

The spelling of 18054889 in words is "eighteen million, fifty-four thousand, eight hundred eighty-nine".