18785839858 has 16 divisors (see below), whose sum is σ = 29422658880. Its totient is φ = 8978807376.

The previous prime is 18785839843. The next prime is 18785839859. The reversal of 18785839858 is 85893858781.

It is not an unprimeable number, because it can be changed into a prime (18785839859) 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, 56685 + ... + 201952.

It is an arithmetic number, because the mean of its divisors is an integer number (1838916180).

Almost surely, 2^18785839858 is an apocalyptic number.

18785839858 is a deficient number, since it is larger than the sum of its proper divisors (10636819022).

18785839858 is a wasteful number, since it uses less digits than its factorization.

18785839858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260241.

The product of its digits is 154828800, while the sum is 70.

The spelling of 18785839858 in words is "eighteen billion, seven hundred eighty-five million, eight hundred thirty-nine thousand, eight hundred fifty-eight".