20590609844 has 12 divisors (see below), whose sum is σ = 41181219744. Its totient is φ = 8824547064.

The previous prime is 20590609829. The next prime is 20590609847. The reversal of 20590609844 is 44890609502.

20590609844 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590609847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367689434 + ... + 367689489.

It is an arithmetic number, because the mean of its divisors is an integer number (3431768312).

Almost surely, 2^20590609844 is an apocalyptic number.

It is an amenable number.

20590609844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20590609844 is a wasteful number, since it uses less digits than its factorization.

20590609844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735378934 (or 735378932 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 20590609844 in words is "twenty billion, five hundred ninety million, six hundred nine thousand, eight hundred forty-four".