18694116923 has 4 divisors (see below), whose sum is σ = 18755010120. Its totient is φ = 18633223728.

The previous prime is 18694116887. The next prime is 18694116941. The reversal of 18694116923 is 32961149681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32961149681 = 1607 ⋅20510983.

It is a cyclic number.

It is not a de Polignac number, because 18694116923 - 2⁸ = 18694116667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18694116523) 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, 30446138 + ... + 30446751.

It is an arithmetic number, because the mean of its divisors is an integer number (4688752530).

Almost surely, 2^18694116923 is an apocalyptic number.

18694116923 is a deficient number, since it is larger than the sum of its proper divisors (60893197).

18694116923 is an equidigital number, since it uses as much as digits as its factorization.

18694116923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60893196.

The product of its digits is 559872, while the sum is 50.

The spelling of 18694116923 in words is "eighteen billion, six hundred ninety-four million, one hundred sixteen thousand, nine hundred twenty-three".