18779439142 has 16 divisors (see below), whose sum is σ = 29406141792. Its totient is φ = 8977731840.

The previous prime is 18779439137. The next prime is 18779439163. The reversal of 18779439142 is 24193497781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28342 + ... + 195862.

It is an arithmetic number, because the mean of its divisors is an integer number (1837883862).

Almost surely, 2^18779439142 is an apocalyptic number.

18779439142 is a deficient number, since it is larger than the sum of its proper divisors (10626702650).

18779439142 is a wasteful number, since it uses less digits than its factorization.

18779439142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169983.

The product of its digits is 3048192, while the sum is 55.

The spelling of 18779439142 in words is "eighteen billion, seven hundred seventy-nine million, four hundred thirty-nine thousand, one hundred forty-two".