18878673238 has 8 divisors (see below), whose sum is σ = 28330766640. Its totient is φ = 9435084360.

The previous prime is 18878673223. The next prime is 18878673251. The reversal of 18878673238 is 83237687881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120578 + ... + 2129461.

It is an arithmetic number, because the mean of its divisors is an integer number (3541345830).

Almost surely, 2^18878673238 is an apocalyptic number.

18878673238 is a deficient number, since it is larger than the sum of its proper divisors (9452093402).

18878673238 is a wasteful number, since it uses less digits than its factorization.

18878673238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252262.

The product of its digits is 21676032, while the sum is 61.

The spelling of 18878673238 in words is "eighteen billion, eight hundred seventy-eight million, six hundred seventy-three thousand, two hundred thirty-eight".