18053181 has 12 divisors (see below), whose sum is σ = 26266240. Its totient is φ = 11948040.

The previous prime is 18053149. The next prime is 18053209. The reversal of 18053181 is 18135081.

It is not a de Polignac number, because 18053181 - 2⁵ = 18053149 is a prime.

It is a super-2 number, since 2×18053181² = 651834688437522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18053131) 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 11 ways as a sum of consecutive naturals, for example, 5965 + ... + 8466.

Almost surely, 2^18053181 is an apocalyptic number.

It is an amenable number.

18053181 is a deficient number, since it is larger than the sum of its proper divisors (8213059).

18053181 is a wasteful number, since it uses less digits than its factorization.

18053181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14576 (or 14573 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18053181 is about 4248.9035056118. The cubic root of 18053181 is about 262.3319850008.

It can be divided in two parts, 180 and 53181, that added together give a square (53361 = 231²).

The spelling of 18053181 in words is "eighteen million, fifty-three thousand, one hundred eighty-one".