40200000020 has 12 divisors (see below), whose sum is σ = 84420000084. Its totient is φ = 16080000000.

The previous prime is 40200000017. The next prime is 40200000077. The reversal of 40200000020 is 2000000204.

It can be written as a sum of positive squares in 2 ways, for example, as 26460878224 + 13739121796 = 162668^2 + 117214^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40199999953 and 40200000007.

It is a congruent number.

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, 1004999981 + ... + 1005000020.

It is an arithmetic number, because the mean of its divisors is an integer number (7035000007).

Almost surely, 2^40200000020 is an apocalyptic number.

It is an amenable number.

40200000020 is an abundant number, since it is smaller than the sum of its proper divisors (44220000064).

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

40200000020 is a wasteful number, since it uses less digits than its factorization.

40200000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010000010 (or 2010000008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

Adding to 40200000020 its reverse (2000000204), we get a palindrome (42200000224).

The spelling of 40200000020 in words is "forty billion, two hundred million, twenty", and thus it is an aban number.