18785916723 has 32 divisors (see below), whose sum is σ = 29685400576. Its totient is φ = 10343230848.

The previous prime is 18785916713. The next prime is 18785916761. The reversal of 18785916723 is 32761958781.

It is a happy number.

It is not a de Polignac number, because 18785916723 - 2⁴ = 18785916707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18785916713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37336 + ... + 197397.

It is an arithmetic number, because the mean of its divisors is an integer number (927668768).

Almost surely, 2^18785916723 is an apocalyptic number.

18785916723 is a deficient number, since it is larger than the sum of its proper divisors (10899483853).

18785916723 is a wasteful number, since it uses less digits than its factorization.

18785916723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234883.

The product of its digits is 5080320, while the sum is 57.

The spelling of 18785916723 in words is "eighteen billion, seven hundred eighty-five million, nine hundred sixteen thousand, seven hundred twenty-three".