40004000002020 has 96 divisors (see below), whose sum is σ = 112365814579200. Its totient is φ = 10633973059584.

The previous prime is 40004000002007. The next prime is 40004000002063. The reversal of 40004000002020 is 2020000040004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40004000001987 and 40004000002005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103312936 + ... + 103699424.

It is an arithmetic number, because the mean of its divisors is an integer number (1170477235200).

Almost surely, 2^{40004000002020} is an apocalyptic number.

It is an amenable number.

40004000002020 is an abundant number, since it is smaller than the sum of its proper divisors (72361814577180).

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

40004000002020 is a wasteful number, since it uses less digits than its factorization.

40004000002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391957 (or 391955 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 40004000002020 its reverse (2020000040004), we get a palindrome (42024000042024).

The spelling of 40004000002020 in words is "forty trillion, four billion, two thousand, twenty".