2180520912 has 160 divisors (see below), whose sum is σ = 6140178432. Its totient is φ = 664215552.

The previous prime is 2180520887. The next prime is 2180520919. The reversal of 2180520912 is 2190250812.

It is a self number, because there is not a number n which added to its sum of digits gives 2180520912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180520919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5492298 + ... + 5492694.

Almost surely, 2^2180520912 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 2180520912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070089216).

2180520912 is an abundant number, since it is smaller than the sum of its proper divisors (3959657520).

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

2180520912 is a wasteful number, since it uses less digits than its factorization.

2180520912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 2180520912 is about 46696.0481411436. The cubic root of 2180520912 is about 1296.7415261846.

The spelling of 2180520912 in words is "two billion, one hundred eighty million, five hundred twenty thousand, nine hundred twelve".