20006044640 has 48 divisors (see below), whose sum is σ = 47277811728. Its totient is φ = 8000126976.

The previous prime is 20006044637. The next prime is 20006044687. The reversal of 20006044640 is 4644060002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611744 + ... + 643616.

It is an arithmetic number, because the mean of its divisors is an integer number (984954411).

Almost surely, 2^20006044640 is an apocalyptic number.

20006044640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20006044640 is an abundant number, since it is smaller than the sum of its proper divisors (27271767088).

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

20006044640 is a wasteful number, since it uses less digits than its factorization.

20006044640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35811 (or 35803 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 20006044640 in words is "twenty billion, six million, forty-four thousand, six hundred forty".