18716723 has 4 divisors (see below), whose sum is σ = 18725520. Its totient is φ = 18707928.

The previous prime is 18716713. The next prime is 18716743. The reversal of 18716723 is 32761781.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18716723 - 2⁴ = 18716707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18716713) 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, 1013 + ... + 6201.

It is an arithmetic number, because the mean of its divisors is an integer number (4681380).

Almost surely, 2^18716723 is an apocalyptic number.

18716723 is a deficient number, since it is larger than the sum of its proper divisors (8797).

18716723 is an equidigital number, since it uses as much as digits as its factorization.

18716723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796.

The product of its digits is 14112, while the sum is 35.

The square root of 18716723 is about 4326.2828155358. The cubic root of 18716723 is about 265.5073843856.

The spelling of 18716723 in words is "eighteen million, seven hundred sixteen thousand, seven hundred twenty-three".