18314538 has 16 divisors (see below), whose sum is σ = 39959136. Its totient is φ = 5549840.

The previous prime is 18314503. The next prime is 18314539. The reversal of 18314538 is 83541381.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18314499 and 18314508.

It is not an unprimeable number, because it can be changed into a prime (18314539) 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 7 ways as a sum of consecutive naturals, for example, 138681 + ... + 138812.

It is an arithmetic number, because the mean of its divisors is an integer number (2497446).

Almost surely, 2^18314538 is an apocalyptic number.

18314538 is an abundant number, since it is smaller than the sum of its proper divisors (21644598).

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

18314538 is a wasteful number, since it uses less digits than its factorization.

18314538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277509.

The product of its digits is 11520, while the sum is 33.

The square root of 18314538 is about 4279.5488079937. The cubic root of 18314538 is about 263.5918567105.

The spelling of 18314538 in words is "eighteen million, three hundred fourteen thousand, five hundred thirty-eight".