40404004002020 has 48 divisors (see below), whose sum is σ = 86630596295040. Its totient is φ = 15825583581696.

The previous prime is 40404004002001. The next prime is 40404004002023. The reversal of 40404004002020 is 2020040040404.

40404004002020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40404004001983 and 40404004002001.

It is not an unprimeable number, because it can be changed into a prime (40404004002023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107510480 + ... + 107885639.

It is an arithmetic number, because the mean of its divisors is an integer number (1804804089480).

Almost surely, 2^{40404004002020} is an apocalyptic number.

It is an amenable number.

40404004002020 is an abundant number, since it is smaller than the sum of its proper divisors (46226592293020).

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

40404004002020 is a wasteful number, since it uses less digits than its factorization.

40404004002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215396324 (or 215396322 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40404004002020 its reverse (2020040040404), we get a palindrome (42424044042424).

The spelling of 40404004002020 in words is "forty trillion, four hundred four billion, four million, two thousand, twenty".