18855842834 has 16 divisors (see below), whose sum is σ = 28360886400. Its totient is φ = 9402234144.

The previous prime is 18855842767. The next prime is 18855842843. The reversal of 18855842834 is 43824855881.

It is a self number, because there is not a number n which added to its sum of digits gives 18855842834.

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, 3093662 + ... + 3099750.

It is an arithmetic number, because the mean of its divisors is an integer number (1772555400).

Almost surely, 2^18855842834 is an apocalyptic number.

18855842834 is a deficient number, since it is larger than the sum of its proper divisors (9505043566).

18855842834 is a wasteful number, since it uses less digits than its factorization.

18855842834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10057.

The product of its digits is 9830400, while the sum is 56.

The spelling of 18855842834 in words is "eighteen billion, eight hundred fifty-five million, eight hundred forty-two thousand, eight hundred thirty-four".