180918894 has 48 divisors (see below), whose sum is σ = 397809792. Its totient is φ = 54815904.

The previous prime is 180918887. The next prime is 180918923. The reversal of 180918894 is 498819081.

180918894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66607 + ... + 69269.

It is an arithmetic number, because the mean of its divisors is an integer number (8287704).

Almost surely, 2^180918894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180918894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198904896).

180918894 is an abundant number, since it is smaller than the sum of its proper divisors (216890898).

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

180918894 is a wasteful number, since it uses less digits than its factorization.

180918894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 180918894 is about 13450.6094285724. The cubic root of 180918894 is about 565.5807785254.

The spelling of 180918894 in words is "one hundred eighty million, nine hundred eighteen thousand, eight hundred ninety-four".