18642134 has 32 divisors (see below), whose sum is σ = 33073920. Its totient is φ = 7715232.

The previous prime is 18642133. The next prime is 18642163. The reversal of 18642134 is 43124681.

It is a junction number, because it is equal to n+sod(n) for n = 18642097 and 18642106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104057 + ... + 104235.

It is an arithmetic number, because the mean of its divisors is an integer number (1033560).

Almost surely, 2^18642134 is an apocalyptic number.

18642134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18642134 is a deficient number, since it is larger than the sum of its proper divisors (14431786).

18642134 is a wasteful number, since it uses less digits than its factorization.

18642134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its digits is 4608, while the sum is 29.

The square root of 18642134 is about 4317.6537610142. The cubic root of 18642134 is about 265.1542190030.

The spelling of 18642134 in words is "eighteen million, six hundred forty-two thousand, one hundred thirty-four".