2442320021 has 32 divisors (see below), whose sum is σ = 2763694080. Its totient is φ = 2146953600.

The previous prime is 2442320017. The next prime is 2442320081. The reversal of 2442320021 is 1200232442.

It is a cyclic number.

It is not a de Polignac number, because 2442320021 - 2² = 2442320017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2442319975 and 2442320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2442320081) 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, 4855256 + ... + 4855758.

It is an arithmetic number, because the mean of its divisors is an integer number (86365440).

Almost surely, 2^2442320021 is an apocalyptic number.

It is an amenable number.

2442320021 is a deficient number, since it is larger than the sum of its proper divisors (321374059).

2442320021 is a wasteful number, since it uses less digits than its factorization.

2442320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2442320021 is about 49419.8342874599. The cubic root of 2442320021 is about 1346.6896526305.

Adding to 2442320021 its reverse (1200232442), we get a palindrome (3642552463).

It can be divided in two parts, 24423 and 20021, that added together give a palindrome (44444).

The spelling of 2442320021 in words is "two billion, four hundred forty-two million, three hundred twenty thousand, twenty-one".