20321142404242 has 8 divisors (see below), whose sum is σ = 30481739725500. Its totient is φ = 10160562495744.

The previous prime is 20321142404161. The next prime is 20321142404279. The reversal of 20321142404242 is 24240424112302.

It can be written as a sum of positive squares in 2 ways, for example, as 20281863524521 + 39278879721 = 4503539^2 + 198189^2 .

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

It is a super-2 number, since 2×20321142404242² (a number of 27 digits) contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 882067 + ... + 6435862.

Almost surely, 2^{20321142404242} is an apocalyptic number.

20321142404242 is a deficient number, since it is larger than the sum of its proper divisors (10160597321258).

20321142404242 is a wasteful number, since it uses less digits than its factorization.

20321142404242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8706380.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 20321142404242 its reverse (24240424112302), we get a palindrome (44561566516544).

The spelling of 20321142404242 in words is "twenty trillion, three hundred twenty-one billion, one hundred forty-two million, four hundred four thousand, two hundred forty-two".