18134181 has 48 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 10523520.

The previous prime is 18134173. The next prime is 18134197. The reversal of 18134181 is 18143181.

It is not a de Polignac number, because 18134181 - 2³ = 18134173 is a prime.

It is a super-2 number, since 2×18134181² = 657697041081522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18134111) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 255376 + ... + 255446.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^18134181 is an apocalyptic number.

It is an amenable number.

18134181 is a deficient number, since it is larger than the sum of its proper divisors (11742939).

18134181 is a wasteful number, since it uses less digits than its factorization.

18134181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 183 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 18134181 is about 4258.4247087391. The cubic root of 18134181 is about 262.7237384969.

The spelling of 18134181 in words is "eighteen million, one hundred thirty-four thousand, one hundred eighty-one".