18423523 has 4 divisors (see below), whose sum is σ = 18435888. Its totient is φ = 18411160.

The previous prime is 18423491. The next prime is 18423533. The reversal of 18423523 is 32532481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18423523 - 2⁵ = 18423491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18423491 and 18423500.

It is not an unprimeable number, because it can be changed into a prime (18423533) 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 3 ways as a sum of consecutive naturals, for example, 3583 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (4608972).

Almost surely, 2^18423523 is an apocalyptic number.

18423523 is a deficient number, since it is larger than the sum of its proper divisors (12365).

18423523 is a wasteful number, since it uses less digits than its factorization.

18423523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12364.

The product of its digits is 5760, while the sum is 28.

The square root of 18423523 is about 4292.2631559586. The cubic root of 18423523 is about 264.1136782776.

The spelling of 18423523 in words is "eighteen million, four hundred twenty-three thousand, five hundred twenty-three".