2001840020 has 24 divisors (see below), whose sum is σ = 4244682624. Its totient is φ = 792961056.

The previous prime is 2001840007. The next prime is 2001840031. The reversal of 2001840020 is 200481002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483824 + ... + 487943.

It is an arithmetic number, because the mean of its divisors is an integer number (176861776).

Almost surely, 2^2001840020 is an apocalyptic number.

2001840020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001840020 is an abundant number, since it is smaller than the sum of its proper divisors (2242842604).

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

2001840020 is a wasteful number, since it uses less digits than its factorization.

2001840020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971879 (or 971877 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2001840020 is about 44741.9268695482. The cubic root of 2001840020 is about 1260.3073114526.

The spelling of 2001840020 in words is "two billion, one million, eight hundred forty thousand, twenty".