18838134 has 48 divisors (see below), whose sum is σ = 46894848. Its totient is φ = 5353776.

The previous prime is 18838129. The next prime is 18838153. The reversal of 18838134 is 43183881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38439 + ... + 38925.

It is an arithmetic number, because the mean of its divisors is an integer number (976976).

Almost surely, 2^18838134 is an apocalyptic number.

18838134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18838134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23447424).

18838134 is an abundant number, since it is smaller than the sum of its proper divisors (28056714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18838134 is a wasteful number, since it uses less digits than its factorization.

18838134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 806 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18838134 is about 4340.2919256658. The cubic root of 18838134 is about 266.0802422471.

The spelling of 18838134 in words is "eighteen million, eight hundred thirty-eight thousand, one hundred thirty-four".