18416723 has 4 divisors (see below), whose sum is σ = 19833408. Its totient is φ = 17000040.

The previous prime is 18416701. The next prime is 18416743. The reversal of 18416723 is 32761481.

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 18416723 - 2¹⁶ = 18351187 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 18416723.

It is not an unprimeable number, because it can be changed into a prime (18416743) 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, 708323 + ... + 708348.

It is an arithmetic number, because the mean of its divisors is an integer number (4958352).

Almost surely, 2^18416723 is an apocalyptic number.

18416723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18416723 is a deficient number, since it is larger than the sum of its proper divisors (1416685).

18416723 is a wasteful number, since it uses less digits than its factorization.

18416723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416684.

The product of its digits is 8064, while the sum is 32.

The square root of 18416723 is about 4291.4709599390. The cubic root of 18416723 is about 264.0811800774.

The spelling of 18416723 in words is "eighteen million, four hundred sixteen thousand, seven hundred twenty-three".