2020644440 has 16 divisors (see below), whose sum is σ = 4546450080. Its totient is φ = 808257760.

The previous prime is 2020644413. The next prime is 2020644467. The reversal of 2020644440 is 444460202.

It is an interprime number because it is at equal distance from previous prime (2020644413) and next prime (2020644467).

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, 25258016 + ... + 25258095.

It is an arithmetic number, because the mean of its divisors is an integer number (284153130).

Almost surely, 2^2020644440 is an apocalyptic number.

2020644440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020644440 is an abundant number, since it is smaller than the sum of its proper divisors (2525805640).

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

2020644440 is a wasteful number, since it uses less digits than its factorization.

2020644440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50516122 (or 50516118 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 2020644440 is about 44951.5788376782. The cubic root of 2020644440 is about 1264.2412797827.

It can be divided in two parts, 20206 and 44440, that added together give a palindrome (64646).

The spelling of 2020644440 in words is "two billion, twenty million, six hundred forty-four thousand, four hundred forty".