18135043 has 4 divisors (see below), whose sum is σ = 18144088. Its totient is φ = 18126000.

The previous prime is 18135037. The next prime is 18135053. The reversal of 18135043 is 34053181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18135043 is a prime.

It is a super-2 number, since 2×18135043² = 657759569223698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18134999 and 18135017.

It is not an unprimeable number, because it can be changed into a prime (18135053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 6022.

It is an arithmetic number, because the mean of its divisors is an integer number (4536022).

Almost surely, 2^18135043 is an apocalyptic number.

18135043 is a deficient number, since it is larger than the sum of its proper divisors (9045).

18135043 is an equidigital number, since it uses as much as digits as its factorization.

18135043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9044.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 18135043 is about 4258.5259186719. The cubic root of 18135043 is about 262.7279012485.

The spelling of 18135043 in words is "eighteen million, one hundred thirty-five thousand, forty-three".