18129038 has 16 divisors (see below), whose sum is σ = 29573424. Its totient is φ = 8300160.

The previous prime is 18128993. The next prime is 18129071. The reversal of 18129038 is 83092181.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18128995 and 18129013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5948 + ... + 8463.

It is an arithmetic number, because the mean of its divisors is an integer number (1848339).

Almost surely, 2^18129038 is an apocalyptic number.

18129038 is a deficient number, since it is larger than the sum of its proper divisors (11444386).

18129038 is a wasteful number, since it uses less digits than its factorization.

18129038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14467.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18129038 is about 4257.8208041203. The cubic root of 18129038 is about 262.6988992914.

The spelling of 18129038 in words is "eighteen million, one hundred twenty-nine thousand, thirty-eight".