18138414 has 16 divisors (see below), whose sum is σ = 41459328. Its totient is φ = 5182392.

The previous prime is 18138409. The next prime is 18138437. The reversal of 18138414 is 41483181.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 215892 + ... + 215975.

It is an arithmetic number, because the mean of its divisors is an integer number (2591208).

Almost surely, 2^18138414 is an apocalyptic number.

18138414 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18138414 is an abundant number, since it is smaller than the sum of its proper divisors (23320914).

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

18138414 is a wasteful number, since it uses less digits than its factorization.

18138414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431879.

The product of its digits is 3072, while the sum is 30.

The square root of 18138414 is about 4258.9216945138. The cubic root of 18138414 is about 262.7441791418.

The spelling of 18138414 in words is "eighteen million, one hundred thirty-eight thousand, four hundred fourteen".