18876434923 has 4 divisors (see below), whose sum is σ = 18878839200. Its totient is φ = 18874030648.

The previous prime is 18876434917. The next prime is 18876434981. The reversal of 18876434923 is 32943467881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32943467881 = 3259 ⋅10108459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18876434923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18876434623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190323 + ... + 1206076.

It is an arithmetic number, because the mean of its divisors is an integer number (4719709800).

Almost surely, 2^18876434923 is an apocalyptic number.

18876434923 is a deficient number, since it is larger than the sum of its proper divisors (2404277).

18876434923 is an equidigital number, since it uses as much as digits as its factorization.

18876434923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404276.

The product of its digits is 6967296, while the sum is 55.

The spelling of 18876434923 in words is "eighteen billion, eight hundred seventy-six million, four hundred thirty-four thousand, nine hundred twenty-three".