42020000020 has 48 divisors (see below), whose sum is σ = 88481202768. Its totient is φ = 16762511360.

The previous prime is 42019999997. The next prime is 42020000041. The reversal of 42020000020 is 2000002024.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17482657284 + 24537342736 = 132222^2 + 156644^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 42019999961 and 42020000006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14503212 + ... + 14506108.

It is an arithmetic number, because the mean of its divisors is an integer number (1843358391).

Almost surely, 2^42020000020 is an apocalyptic number.

It is an amenable number.

42020000020 is an abundant number, since it is smaller than the sum of its proper divisors (46461202748).

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

42020000020 is a wasteful number, since it uses less digits than its factorization.

42020000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620 (or 4618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 42020000020 its reverse (2000002024), we get a palindrome (44020002044).

The spelling of 42020000020 in words is "forty-two billion, twenty million, twenty", and thus it is an aban number and an uban number.