18059189 has 2 divisors, whose sum is σ = 18059190. Its totient is φ = 18059188.

The previous prime is 18059179. The next prime is 18059201. The reversal of 18059189 is 98195081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 8168164 = 3145^2 + 2858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18059189 is a prime.

It is a super-2 number, since 2×18059189² = 652268614675442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18059149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029594 + 9029595.

It is an arithmetic number, because the mean of its divisors is an integer number (9029595).

Almost surely, 2^18059189 is an apocalyptic number.

It is an amenable number.

18059189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059189 is an equidigital number, since it uses as much as digits as its factorization.

18059189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 18059189 is about 4249.6104527356. The cubic root of 18059189 is about 262.3610826569.

The spelling of 18059189 in words is "eighteen million, fifty-nine thousand, one hundred eighty-nine".