40420002020 has 24 divisors (see below), whose sum is σ = 86320684800. Its totient is φ = 15893966432.

The previous prime is 40420001971. The next prime is 40420002031. The reversal of 40420002020 is 2020002404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40420001986 and 40420002004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17125940 + ... + 17128299.

It is an arithmetic number, because the mean of its divisors is an integer number (3596695200).

Almost surely, 2^40420002020 is an apocalyptic number.

It is an amenable number.

40420002020 is an abundant number, since it is smaller than the sum of its proper divisors (45900682780).

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

40420002020 is a wasteful number, since it uses less digits than its factorization.

40420002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34254307 (or 34254305 counting only the distinct ones).

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

Adding to 40420002020 its reverse (2020002404), we get a palindrome (42440004424).

The spelling of 40420002020 in words is "forty billion, four hundred twenty million, two thousand, twenty".