18129842 has 16 divisors (see below), whose sum is σ = 28771200. Its totient is φ = 8550432.

The previous prime is 18129791. The next prime is 18129847. The reversal of 18129842 is 24892181.

It is not an unprimeable number, because it can be changed into a prime (18129847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659 + ... + 6057.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^18129842 is an apocalyptic number.

18129842 is a deficient number, since it is larger than the sum of its proper divisors (10641358).

18129842 is a wasteful number, since it uses less digits than its factorization.

18129842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497.

The product of its digits is 9216, while the sum is 35.

The square root of 18129842 is about 4257.9152175683. The cubic root of 18129842 is about 262.7027826891.

The spelling of 18129842 in words is "eighteen million, one hundred twenty-nine thousand, eight hundred forty-two".