18016732723 has 8 divisors (see below), whose sum is σ = 19716623280. Its totient is φ = 16327176480.

The previous prime is 18016732717. The next prime is 18016732777. The reversal of 18016732723 is 32723761081.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18016732723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18016730723) 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, 2579928 + ... + 2586901.

It is an arithmetic number, because the mean of its divisors is an integer number (2464577910).

Almost surely, 2^18016732723 is an apocalyptic number.

18016732723 is a deficient number, since it is larger than the sum of its proper divisors (1699890557).

18016732723 is a wasteful number, since it uses less digits than its factorization.

18016732723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167157.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 18016732723 in words is "eighteen billion, sixteen million, seven hundred thirty-two thousand, seven hundred twenty-three".