20320131444 has 24 divisors (see below), whose sum is σ = 47754749280. Its totient is φ = 6724647264.

The previous prime is 20320131421. The next prime is 20320131479. The reversal of 20320131444 is 44413102302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6089499 + ... + 6092834.

It is an arithmetic number, because the mean of its divisors is an integer number (1989781220).

Almost surely, 2^20320131444 is an apocalyptic number.

It is an amenable number.

20320131444 is an abundant number, since it is smaller than the sum of its proper divisors (27434617836).

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

20320131444 is a wasteful number, since it uses less digits than its factorization.

20320131444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12182479 (or 12182477 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20320131444 its reverse (44413102302), we get a palindrome (64733233746).

The spelling of 20320131444 in words is "twenty billion, three hundred twenty million, one hundred thirty-one thousand, four hundred forty-four".