18878673223 has 2 divisors, whose sum is σ = 18878673224. Its totient is φ = 18878673222.

The previous prime is 18878673221. The next prime is 18878673251. The reversal of 18878673223 is 32237687881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18878673223 - 2¹ = 18878673221 is a prime.

Together with 18878673221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18878673221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9439336611 + 9439336612.

It is an arithmetic number, because the mean of its divisors is an integer number (9439336612).

Almost surely, 2^18878673223 is an apocalyptic number.

18878673223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18878673223 is an equidigital number, since it uses as much as digits as its factorization.

18878673223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 55.

The spelling of 18878673223 in words is "eighteen billion, eight hundred seventy-eight million, six hundred seventy-three thousand, two hundred twenty-three".