2320021640 has 16 divisors (see below), whose sum is σ = 5220048780. Its totient is φ = 928008640.

The previous prime is 2320021609. The next prime is 2320021643. The reversal of 2320021640 is 461200232.

It can be written as a sum of positive squares in 2 ways, for example, as 2220859876 + 99161764 = 47126^2 + 9958^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2320021643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29000231 + ... + 29000310.

Almost surely, 2^2320021640 is an apocalyptic number.

2320021640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2320021640 is an abundant number, since it is smaller than the sum of its proper divisors (2900027140).

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

2320021640 is a wasteful number, since it uses less digits than its factorization.

2320021640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58000552 (or 58000548 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2320021640 is about 48166.6029526684. The cubic root of 2320021640 is about 1323.8253056112.

Adding to 2320021640 its reverse (461200232), we get a palindrome (2781221872).

The spelling of 2320021640 in words is "two billion, three hundred twenty million, twenty-one thousand, six hundred forty".