2181603432 has 16 divisors (see below), whose sum is σ = 5454008640. Its totient is φ = 727201136.

The previous prime is 2181603401. The next prime is 2181603433. The reversal of 2181603432 is 2343061812.

It is a self number, because there is not a number n which added to its sum of digits gives 2181603432.

It is not an unprimeable number, because it can be changed into a prime (2181603433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45450048 + ... + 45450095.

It is an arithmetic number, because the mean of its divisors is an integer number (340875540).

Almost surely, 2^2181603432 is an apocalyptic number.

It is an amenable number.

2181603432 is an abundant number, since it is smaller than the sum of its proper divisors (3272405208).

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

2181603432 is a wasteful number, since it uses less digits than its factorization.

2181603432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90900152 (or 90900148 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2181603432 is about 46707.6378336563. The cubic root of 2181603432 is about 1296.9560798717.

The spelling of 2181603432 in words is "two billion, one hundred eighty-one million, six hundred three thousand, four hundred thirty-two".