18316423 has 4 divisors (see below), whose sum is σ = 18381888. Its totient is φ = 18250960.

The previous prime is 18316411. The next prime is 18316427. The reversal of 18316423 is 32461381.

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 18316423 - 2⁵ = 18316391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18316391 and 18316400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18316427) 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, 32311 + ... + 32872.

It is an arithmetic number, because the mean of its divisors is an integer number (4595472).

Almost surely, 2^18316423 is an apocalyptic number.

18316423 is a deficient number, since it is larger than the sum of its proper divisors (65465).

18316423 is an equidigital number, since it uses as much as digits as its factorization.

18316423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65464.

The product of its digits is 3456, while the sum is 28.

The square root of 18316423 is about 4279.7690358242. The cubic root of 18316423 is about 263.6008996832.

The spelling of 18316423 in words is "eighteen million, three hundred sixteen thousand, four hundred twenty-three".