20013243221140 has 24 divisors (see below), whose sum is σ = 45260719285320. Its totient is φ = 7389505189248.

The previous prime is 20013243221047. The next prime is 20013243221173. The reversal of 20013243221140 is 4112234231002.

It can be written as a sum of positive squares in 4 ways, for example, as 489871208464 + 19523372012676 = 699908^2 + 4418526^2 .

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, 38487005935 + ... + 38487006454.

It is an arithmetic number, because the mean of its divisors is an integer number (1885863303555).

Almost surely, 2^{20013243221140} is an apocalyptic number.

20013243221140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013243221140 is an abundant number, since it is smaller than the sum of its proper divisors (25247476064180).

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

20013243221140 is a wasteful number, since it uses less digits than its factorization.

20013243221140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76974012411 (or 76974012409 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20013243221140 its reverse (4112234231002), we get a palindrome (24125477452142).

The spelling of 20013243221140 in words is "twenty trillion, thirteen billion, two hundred forty-three million, two hundred twenty-one thousand, one hundred forty".