18378835827 has 8 divisors (see below), whose sum is σ = 26732852160. Its totient is φ = 11138688360.

The previous prime is 18378835819. The next prime is 18378835829. The reversal of 18378835827 is 72853887381.

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

It is not a de Polignac number, because 18378835827 - 2³ = 18378835819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18378835829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278467177 + ... + 278467242.

It is an arithmetic number, because the mean of its divisors is an integer number (3341606520).

Almost surely, 2^18378835827 is an apocalyptic number.

18378835827 is a deficient number, since it is larger than the sum of its proper divisors (8354016333).

18378835827 is a wasteful number, since it uses less digits than its factorization.

18378835827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556934433.

The product of its digits is 18063360, while the sum is 60.

The spelling of 18378835827 in words is "eighteen billion, three hundred seventy-eight million, eight hundred thirty-five thousand, eight hundred twenty-seven".