18133123 has 4 divisors (see below), whose sum is σ = 18233488. Its totient is φ = 18032760.

The previous prime is 18133099. The next prime is 18133133. The reversal of 18133123 is 32133181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32133181 = 929 ⋅34589.

It is a cyclic number.

It is not a de Polignac number, because 18133123 - 2¹⁷ = 18002051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18133094 and 18133103.

It is not an unprimeable number, because it can be changed into a prime (18133133) 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, 49911 + ... + 50272.

It is an arithmetic number, because the mean of its divisors is an integer number (4558372).

Almost surely, 2^18133123 is an apocalyptic number.

18133123 is a deficient number, since it is larger than the sum of its proper divisors (100365).

18133123 is a wasteful number, since it uses less digits than its factorization.

18133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100364.

The product of its digits is 432, while the sum is 22.

The square root of 18133123 is about 4258.3004825869. The cubic root of 18133123 is about 262.7186290460.

The spelling of 18133123 in words is "eighteen million, one hundred thirty-three thousand, one hundred twenty-three".