18478342316 has 48 divisors (see below), whose sum is σ = 38212134912. Its totient is φ = 7653878400.

The previous prime is 18478342283. The next prime is 18478342349. The reversal of 18478342316 is 61324387481.

It is an interprime number because it is at equal distance from previous prime (18478342283) and next prime (18478342349).

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, 47621 + ... + 198051.

It is an arithmetic number, because the mean of its divisors is an integer number (796086144).

Almost surely, 2^18478342316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18478342316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19106067456).

18478342316 is an abundant number, since it is smaller than the sum of its proper divisors (19733792596).

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

18478342316 is a wasteful number, since it uses less digits than its factorization.

18478342316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150590 (or 150588 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 18478342316 in words is "eighteen billion, four hundred seventy-eight million, three hundred forty-two thousand, three hundred sixteen".