20013721234744 has 8 divisors (see below), whose sum is σ = 37525727315160. Its totient is φ = 10006860617368.

The previous prime is 20013721234729. The next prime is 20013721234753. The reversal of 20013721234744 is 44743212731002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20013721234697 and 20013721234706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250857577164 + ... + 1250857577179.

It is an arithmetic number, because the mean of its divisors is an integer number (4690715914395).

Almost surely, 2^{20013721234744} is an apocalyptic number.

It is an amenable number.

20013721234744 is a deficient number, since it is larger than the sum of its proper divisors (17512006080416).

20013721234744 is a wasteful number, since it uses less digits than its factorization.

20013721234744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501715154349 (or 2501715154345 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

Adding to 20013721234744 its reverse (44743212731002), we get a palindrome (64756933965746).

The spelling of 20013721234744 in words is "twenty trillion, thirteen billion, seven hundred twenty-one million, two hundred thirty-four thousand, seven hundred forty-four".