18314189 has 2 divisors, whose sum is σ = 18314190. Its totient is φ = 18314188.

The previous prime is 18314183. The next prime is 18314201. The reversal of 18314189 is 98141381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14760964 + 3553225 = 3842^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 18314189 - 2¹⁶ = 18248653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18314183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9157094 + 9157095.

It is an arithmetic number, because the mean of its divisors is an integer number (9157095).

Almost surely, 2^18314189 is an apocalyptic number.

It is an amenable number.

18314189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18314189 is an equidigital number, since it uses as much as digits as its factorization.

18314189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 18314189 is about 4279.5080324729. The cubic root of 18314189 is about 263.5901823732.

The spelling of 18314189 in words is "eighteen million, three hundred fourteen thousand, one hundred eighty-nine".