42020220020 has 48 divisors (see below), whose sum is σ = 89999855568. Its totient is φ = 16473999360.

The previous prime is 42020219993. The next prime is 42020220029. The reversal of 42020220020 is 2002202024.

It can be written as a sum of positive squares in 8 ways, for example, as 139876 + 42020080144 = 374^2 + 204988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42020219977 and 42020220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020220029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036940 + ... + 1076700.

It is an arithmetic number, because the mean of its divisors is an integer number (1874996991).

Almost surely, 2^42020220020 is an apocalyptic number.

It is an amenable number.

42020220020 is an abundant number, since it is smaller than the sum of its proper divisors (47979635548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42020220020 is a wasteful number, since it uses less digits than its factorization.

42020220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40820 (or 40818 counting only the distinct ones).

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

Adding to 42020220020 its reverse (2002202024), we get a palindrome (44022422044).

The spelling of 42020220020 in words is "forty-two billion, twenty million, two hundred twenty thousand, twenty".