18805142378 has 32 divisors (see below), whose sum is σ = 32404648320. Its totient is φ = 8101114560.

The previous prime is 18805142347. The next prime is 18805142459. The reversal of 18805142378 is 87324150881.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 115325 + ... + 225632.

It is an arithmetic number, because the mean of its divisors is an integer number (1012645260).

Almost surely, 2^18805142378 is an apocalyptic number.

18805142378 is a deficient number, since it is larger than the sum of its proper divisors (13599505942).

18805142378 is a wasteful number, since it uses less digits than its factorization.

18805142378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341102.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 18805142378 in words is "eighteen billion, eight hundred five million, one hundred forty-two thousand, three hundred seventy-eight".