20402220014042 has 4 divisors (see below), whose sum is σ = 30603330021066. Its totient is φ = 10201110007020.

The previous prime is 20402220014017. The next prime is 20402220014081. The reversal of 20402220014042 is 24041002220402.

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., 20291051784481 + 111168229561 = 4504559^2 + 333419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20402220013999 and 20402220014017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100555003509 + ... + 5100555003512.

Almost surely, 2^{20402220014042} is an apocalyptic number.

20402220014042 is a deficient number, since it is larger than the sum of its proper divisors (10201110007024).

20402220014042 is a wasteful number, since it uses less digits than its factorization.

20402220014042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201110007023.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 20402220014042 its reverse (24041002220402), we get a palindrome (44443222234444).

The spelling of 20402220014042 in words is "twenty trillion, four hundred two billion, two hundred twenty million, fourteen thousand, forty-two".