18245723 has 4 divisors (see below), whose sum is σ = 18292080. Its totient is φ = 18199368.

The previous prime is 18245707. The next prime is 18245741. The reversal of 18245723 is 32754281.

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 18245723 - 2⁴ = 18245707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18245723.

It is not an unprimeable number, because it can be changed into a prime (18245753) 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, 22583 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (4573020).

Almost surely, 2^18245723 is an apocalyptic number.

18245723 is a deficient number, since it is larger than the sum of its proper divisors (46357).

18245723 is an equidigital number, since it uses as much as digits as its factorization.

18245723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46356.

The product of its digits is 13440, while the sum is 32.

The square root of 18245723 is about 4271.5012583400. The cubic root of 18245723 is about 263.2613025585.

The spelling of 18245723 in words is "eighteen million, two hundred forty-five thousand, seven hundred twenty-three".