20461321262042 has 4 divisors (see below), whose sum is σ = 30691981893066. Its totient is φ = 10230660631020.

The previous prime is 20461321261993. The next prime is 20461321262069. The reversal of 20461321262042 is 24026212316402.

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., 16855959571201 + 3605361690841 = 4105601^2 + 1898779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20461321261993 and 20461321262011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115330315509 + ... + 5115330315512.

Almost surely, 2^{20461321262042} is an apocalyptic number.

20461321262042 is a deficient number, since it is larger than the sum of its proper divisors (10230660631024).

20461321262042 is a wasteful number, since it uses less digits than its factorization.

20461321262042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230660631023.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 20461321262042 its reverse (24026212316402), we get a palindrome (44487533578444).

The spelling of 20461321262042 in words is "twenty trillion, four hundred sixty-one billion, three hundred twenty-one million, two hundred sixty-two thousand, forty-two".