500018634138 has 16 divisors (see below), whose sum is σ = 1009746369216. Its totient is φ = 165054694560.

The previous prime is 500018634109. The next prime is 500018634139. The reversal of 500018634138 is 831436810005.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 500018634096 and 500018634105.

It is not an unprimeable number, because it can be changed into a prime (500018634139) 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, 404545203 + ... + 404546438.

It is an arithmetic number, because the mean of its divisors is an integer number (63109148076).

Almost surely, 2^500018634138 is an apocalyptic number.

500018634138 is an abundant number, since it is smaller than the sum of its proper divisors (509727735078).

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

500018634138 is a wasteful number, since it uses less digits than its factorization.

500018634138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809091749.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 500018634138 in words is "five hundred billion, eighteen million, six hundred thirty-four thousand, one hundred thirty-eight".