2001840004020 has 24 divisors (see below), whose sum is σ = 5605152011424. Its totient is φ = 533824001056.

The previous prime is 2001840003997. The next prime is 2001840004027. The reversal of 2001840004020 is 204000481002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001840004027) 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 7 ways as a sum of consecutive naturals, for example, 16681999974 + ... + 16682000093.

It is an arithmetic number, because the mean of its divisors is an integer number (233548000476).

Almost surely, 2^{2001840004020} is an apocalyptic number.

2001840004020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001840004020 is an abundant number, since it is smaller than the sum of its proper divisors (3603312007404).

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

2001840004020 is a wasteful number, since it uses less digits than its factorization.

2001840004020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33364000079 (or 33364000077 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2001840004020 its reverse (204000481002), we get a palindrome (2205840485022).

The spelling of 2001840004020 in words is "two trillion, one billion, eight hundred forty million, four thousand, twenty".