18051143 has 6 divisors (see below), whose sum is σ = 19841472. Its totient is φ = 16410020.

The previous prime is 18051139. The next prime is 18051151. The reversal of 18051143 is 34115081.

It is not a de Polignac number, because 18051143 - 2² = 18051139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051643) 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 5 ways as a sum of consecutive naturals, for example, 74471 + ... + 74712.

It is an arithmetic number, because the mean of its divisors is an integer number (3306912).

Almost surely, 2^18051143 is an apocalyptic number.

18051143 is a deficient number, since it is larger than the sum of its proper divisors (1790329).

18051143 is a wasteful number, since it uses less digits than its factorization.

18051143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149205 (or 149194 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 18051143 is about 4248.6636722621. The cubic root of 18051143 is about 262.3221131910.

The spelling of 18051143 in words is "eighteen million, fifty-one thousand, one hundred forty-three".