18040850816 has 96 divisors (see below), whose sum is σ = 39242847600. Its totient is φ = 8250375168.

The previous prime is 18040850801. The next prime is 18040850827. The reversal of 18040850816 is 61805804081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1333301 + ... + 1346763.

Almost surely, 2^18040850816 is an apocalyptic number.

18040850816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18040850816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19621423800).

18040850816 is an abundant number, since it is smaller than the sum of its proper divisors (21201996784).

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

18040850816 is a wasteful number, since it uses less digits than its factorization.

18040850816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13544 (or 13513 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 41.

The spelling of 18040850816 in words is "eighteen billion, forty million, eight hundred fifty thousand, eight hundred sixteen".