42000842020 has 12 divisors (see below), whose sum is σ = 88201768284. Its totient is φ = 16800336800.

The previous prime is 42000841979. The next prime is 42000842077. The reversal of 42000842020 is 2024800024.

It can be written as a sum of positive squares in 2 ways, for example, as 5433458944 + 36567383076 = 73712^2 + 191226^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42000841982 and 42000842000.

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, 1050021031 + ... + 1050021070.

It is an arithmetic number, because the mean of its divisors is an integer number (7350147357).

Almost surely, 2^42000842020 is an apocalyptic number.

It is an amenable number.

42000842020 is an abundant number, since it is smaller than the sum of its proper divisors (46200926264).

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

42000842020 is a wasteful number, since it uses less digits than its factorization.

42000842020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100042110 (or 2100042108 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The spelling of 42000842020 in words is "forty-two billion, eight hundred forty-two thousand, twenty".