18434143 has 24 divisors (see below), whose sum is σ = 23665488. Its totient is φ = 14224896.

The previous prime is 18434113. The next prime is 18434153. The reversal of 18434143 is 34143481.

It is not a de Polignac number, because 18434143 - 2¹³ = 18425951 is a prime.

It is the 4294-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434113) by changing a digit.

It is a nontrivial repunit in base 4293.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27055 + ... + 27727.

It is an arithmetic number, because the mean of its divisors is an integer number (986062).

Almost surely, 2^18434143 is an apocalyptic number.

18434143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18434143 is a deficient number, since it is larger than the sum of its proper divisors (5231345).

18434143 is a wasteful number, since it uses less digits than its factorization.

18434143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 736 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 18434143 is about 4293.5000873413. The cubic root of 18434143 is about 264.1644168269.

The spelling of 18434143 in words is "eighteen million, four hundred thirty-four thousand, one hundred forty-three".