180821016 has 48 divisors (see below), whose sum is σ = 505527360. Its totient is φ = 58328640.

The previous prime is 180820987. The next prime is 180821023. The reversal of 180821016 is 610128081.

180821016 is digitally balanced in base 3, 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 11 ways as a sum of consecutive naturals, for example, 38275 + ... + 42738.

It is an arithmetic number, because the mean of its divisors is an integer number (10531820).

Almost surely, 2^180821016 is an apocalyptic number.

It is an amenable number.

180821016 is an abundant number, since it is smaller than the sum of its proper divisors (324706344).

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

180821016 is a wasteful number, since it uses less digits than its factorization.

180821016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81056 (or 81049 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 180821016 is about 13446.9705138369. The cubic root of 180821016 is about 565.4787661445.

Adding to 180821016 its reverse (610128081), we get a palindrome (790949097).

The spelling of 180821016 in words is "one hundred eighty million, eight hundred twenty-one thousand, sixteen".