20042242042 has 8 divisors (see below), whose sum is σ = 30077281332. Its totient is φ = 10016481600.

The previous prime is 20042242037. The next prime is 20042242061. The reversal of 20042242042 is 24024224002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18149208961 + 1893033081 = 134719^2 + 43509^2 .

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

It is a super-2 number, since 2×20042242042² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314309 + ... + 2322952.

Almost surely, 2^20042242042 is an apocalyptic number.

20042242042 is a deficient number, since it is larger than the sum of its proper divisors (10035039290).

20042242042 is a wasteful number, since it uses less digits than its factorization.

20042242042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639424.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20042242042 its reverse (24024224002), we get a palindrome (44066466044).

The spelling of 20042242042 in words is "twenty billion, forty-two million, two hundred forty-two thousand, forty-two".