2042342021 has 8 divisors (see below), whose sum is σ = 2100837144. Its totient is φ = 1984020480.

The previous prime is 2042341997. The next prime is 2042342059. The reversal of 2042342021 is 1202432402.

It can be written as a sum of positive squares in 4 ways, for example, as 409050625 + 1633291396 = 20225^2 + 40414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2042342021 - 2²⁶ = 1975233157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042341984 and 2042342002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042342221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19340 + ... + 66773.

It is an arithmetic number, because the mean of its divisors is an integer number (262604643).

Almost surely, 2^2042342021 is an apocalyptic number.

It is an amenable number.

2042342021 is a deficient number, since it is larger than the sum of its proper divisors (58495123).

2042342021 is an equidigital number, since it uses as much as digits as its factorization.

2042342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86791.

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

The square root of 2042342021 is about 45192.2783338039. The cubic root of 2042342021 is about 1268.7502991870.

Adding to 2042342021 its reverse (1202432402), we get a palindrome (3244774423).

The spelling of 2042342021 in words is "two billion, forty-two million, three hundred forty-two thousand, twenty-one".