18057143 has 8 divisors (see below), whose sum is σ = 19563600. Its totient is φ = 16666104.

The previous prime is 18057107. The next prime is 18057173. The reversal of 18057143 is 34175081.

It is not a de Polignac number, because 18057143 - 2⁶ = 18057079 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 (18057173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913 + ... + 6306.

It is an arithmetic number, because the mean of its divisors is an integer number (2445450).

Almost surely, 2^18057143 is an apocalyptic number.

18057143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18057143 is a deficient number, since it is larger than the sum of its proper divisors (1506457).

18057143 is an frugal number, since it uses more digits than its factorization.

18057143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258 (or 8232 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18057143 is about 4249.3697179699. The cubic root of 18057143 is about 262.3511742930.

The spelling of 18057143 in words is "eighteen million, fifty-seven thousand, one hundred forty-three".