18123423 has 8 divisors (see below), whose sum is σ = 24279936. Its totient is φ = 12024600.

The previous prime is 18123421. The next prime is 18123431. The reversal of 18123423 is 32432181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18123423 - 2¹ = 18123421 is a prime.

It is a super-2 number, since 2×18123423² = 656916922473858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18123393 and 18123402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123421) 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, 13683 + ... + 14948.

It is an arithmetic number, because the mean of its divisors is an integer number (3034992).

Almost surely, 2^18123423 is an apocalyptic number.

18123423 is a deficient number, since it is larger than the sum of its proper divisors (6156513).

18123423 is a wasteful number, since it uses less digits than its factorization.

18123423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28845.

The product of its digits is 1152, while the sum is 24.

The square root of 18123423 is about 4257.1613781956. The cubic root of 18123423 is about 262.6717750974.

The spelling of 18123423 in words is "eighteen million, one hundred twenty-three thousand, four hundred twenty-three".