18129159 has 6 divisors (see below), whose sum is σ = 26186576. Its totient is φ = 12086100.

The previous prime is 18129151. The next prime is 18129161. The reversal of 18129159 is 95192181.

It is not a de Polignac number, because 18129159 - 2³ = 18129151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18129151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1007167 + ... + 1007184.

Almost surely, 2^18129159 is an apocalyptic number.

18129159 is a deficient number, since it is larger than the sum of its proper divisors (8057417).

18129159 is a wasteful number, since it uses less digits than its factorization.

18129159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014357 (or 2014354 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 18129159 is about 4257.8350132432. The cubic root of 18129159 is about 262.6994837405.

The spelling of 18129159 in words is "eighteen million, one hundred twenty-nine thousand, one hundred fifty-nine".