20042341220042 has 4 divisors (see below), whose sum is σ = 30063511830066. Its totient is φ = 10021170610020.

The previous prime is 20042341219997. The next prime is 20042341220051. The reversal of 20042341220042 is 24002214324002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18944961361561 + 1097379858481 = 4352581^2 + 1047559^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20042341219993 and 20042341220020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010585305009 + ... + 5010585305012.

Almost surely, 2^{20042341220042} is an apocalyptic number.

20042341220042 is a deficient number, since it is larger than the sum of its proper divisors (10021170610024).

20042341220042 is a wasteful number, since it uses less digits than its factorization.

20042341220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021170610023.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20042341220042 its reverse (24002214324002), we get a palindrome (44044555544044).

The spelling of 20042341220042 in words is "twenty trillion, forty-two billion, three hundred forty-one million, two hundred twenty thousand, forty-two".