20202020042 has 8 divisors (see below), whose sum is σ = 30303636132. Its totient is φ = 10100808000.

The previous prime is 20202019993. The next prime is 20202020053. The reversal of 20202020042 is 24002020202.

It can be written as a sum of positive squares in 2 ways, for example, as 19540964521 + 661055521 = 139789^2 + 25711^2 .

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

It is a super-2 number, since 2×20202020042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20202019999 and 20202020026.

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, 126242 + ... + 237362.

Almost surely, 2^20202020042 is an apocalyptic number.

20202020042 is a deficient number, since it is larger than the sum of its proper divisors (10101616090).

20202020042 is a wasteful number, since it uses less digits than its factorization.

20202020042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202024.

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20202020042 its reverse (24002020202), we get a palindrome (44204040244).

The spelling of 20202020042 in words is "twenty billion, two hundred two million, twenty thousand, forty-two".