18314478 has 64 divisors (see below), whose sum is σ = 50104320. Its totient is φ = 4828896.

The previous prime is 18314477. The next prime is 18314489. The reversal of 18314478 is 87441381.

18314478 is a `hidden beast` number, since 183 + 1 + 4 + 478 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18314477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3051 + ... + 6777.

It is an arithmetic number, because the mean of its divisors is an integer number (782880).

Almost surely, 2^18314478 is an apocalyptic number.

18314478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18314478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25052160).

18314478 is an abundant number, since it is smaller than the sum of its proper divisors (31789842).

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

18314478 is a wasteful number, since it uses less digits than its factorization.

18314478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758 (or 3752 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18314478 is about 4279.5417979031. The cubic root of 18314478 is about 263.5915688603.

The spelling of 18314478 in words is "eighteen million, three hundred fourteen thousand, four hundred seventy-eight".