18047338 has 16 divisors (see below), whose sum is σ = 28469160. Its totient is φ = 8568000.

The previous prime is 18047303. The next prime is 18047347. The reversal of 18047338 is 83374081.

It can be written as a sum of positive squares in 4 ways, for example, as 4231249 + 13816089 = 2057^2 + 3717^2 .

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, 988 + ... + 6088.

Almost surely, 2^18047338 is an apocalyptic number.

18047338 is a deficient number, since it is larger than the sum of its proper divisors (10421822).

18047338 is a wasteful number, since it uses less digits than its factorization.

18047338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 18047338 is about 4248.2158608056. The cubic root of 18047338 is about 262.3036802718.

The spelling of 18047338 in words is "eighteen million, forty-seven thousand, three hundred thirty-eight".