2321765021 has 24 divisors (see below), whose sum is σ = 2604293280. Its totient is φ = 2063722752.

The previous prime is 2321764999. The next prime is 2321765051. The reversal of 2321765021 is 1205671232.

It is a happy number.

It is not a de Polignac number, because 2321765021 - 2³⁰ = 1248023197 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 (2321765051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3003191 + ... + 3003963.

It is an arithmetic number, because the mean of its divisors is an integer number (108512220).

Almost surely, 2^2321765021 is an apocalyptic number.

It is an amenable number.

2321765021 is a deficient number, since it is larger than the sum of its proper divisors (282528259).

2321765021 is a wasteful number, since it uses less digits than its factorization.

2321765021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2321765021 is about 48184.6969586818. The cubic root of 2321765021 is about 1324.1568189023.

The spelling of 2321765021 in words is "two billion, three hundred twenty-one million, seven hundred sixty-five thousand, twenty-one".