18031706723 has 4 divisors (see below), whose sum is σ = 18098739360. Its totient is φ = 17964674088.

The previous prime is 18031706711. The next prime is 18031706741. The reversal of 18031706723 is 32760713081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32760713081 = 41467 ⋅790043.

It is a cyclic number.

It is not a de Polignac number, because 18031706723 - 2⁸ = 18031706467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18031706023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33515915 + ... + 33516452.

It is an arithmetic number, because the mean of its divisors is an integer number (4524684840).

Almost surely, 2^18031706723 is an apocalyptic number.

18031706723 is a deficient number, since it is larger than the sum of its proper divisors (67032637).

18031706723 is an equidigital number, since it uses as much as digits as its factorization.

18031706723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67032636.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 18031706723 in words is "eighteen billion, thirty-one million, seven hundred six thousand, seven hundred twenty-three".