2180832021 has 12 divisors (see below), whose sum is σ = 3172755040. Its totient is φ = 1443427560.

The previous prime is 2180831999. The next prime is 2180832037. The reversal of 2180832021 is 1202380812.

It is not a de Polignac number, because 2180832021 - 2⁹ = 2180831509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180832041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870385 + ... + 872886.

Almost surely, 2^2180832021 is an apocalyptic number.

It is an amenable number.

2180832021 is a deficient number, since it is larger than the sum of its proper divisors (991923019).

2180832021 is a wasteful number, since it uses less digits than its factorization.

2180832021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743416 (or 1743413 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2180832021 is about 46699.3792357029. The cubic root of 2180832021 is about 1296.8031947477.

The spelling of 2180832021 in words is "two billion, one hundred eighty million, eight hundred thirty-two thousand, twenty-one".