18845637834 has 32 divisors (see below), whose sum is σ = 39389898240. Its totient is φ = 5999607152.

The previous prime is 18845637817. The next prime is 18845637947. The reversal of 18845637834 is 43873654881.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12672 + ... + 194555.

It is an arithmetic number, because the mean of its divisors is an integer number (1230934320).

Almost surely, 2^18845637834 is an apocalyptic number.

18845637834 is an abundant number, since it is smaller than the sum of its proper divisors (20544260406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18845637834 is a wasteful number, since it uses less digits than its factorization.

18845637834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207914.

The product of its digits is 15482880, while the sum is 57.

The spelling of 18845637834 in words is "eighteen billion, eight hundred forty-five million, six hundred thirty-seven thousand, eight hundred thirty-four".