40220042020 has 12 divisors (see below), whose sum is σ = 84462088284. Its totient is φ = 16088016800.

The previous prime is 40220042003. The next prime is 40220042039. The reversal of 40220042020 is 2024002204.

It can be written as a sum of positive squares in 2 ways, for example, as 30883844644 + 9336197376 = 175738^2 + 96624^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40220041985 and 40220042003.

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, 1005501031 + ... + 1005501070.

It is an arithmetic number, because the mean of its divisors is an integer number (7038507357).

Almost surely, 2^40220042020 is an apocalyptic number.

It is an amenable number.

40220042020 is an abundant number, since it is smaller than the sum of its proper divisors (44242046264).

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

40220042020 is a wasteful number, since it uses less digits than its factorization.

40220042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011002110 (or 2011002108 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40220042020 its reverse (2024002204), we get a palindrome (42244044224).

The spelling of 40220042020 in words is "forty billion, two hundred twenty million, forty-two thousand, twenty".