20013721234743 has 16 divisors (see below), whose sum is σ = 28172784773120. Its totient is φ = 12602736832896.

The previous prime is 20013721234729. The next prime is 20013721234753. The reversal of 20013721234743 is 34743212731002.

It is not a de Polignac number, because 20013721234743 - 2⁹ = 20013721234231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013721234753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520927255 + ... + 520965672.

It is an arithmetic number, because the mean of its divisors is an integer number (1760799048320).

Almost surely, 2^{20013721234743} is an apocalyptic number.

20013721234743 is a deficient number, since it is larger than the sum of its proper divisors (8159063538377).

20013721234743 is a wasteful number, since it uses less digits than its factorization.

20013721234743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041893286.

The product of its (nonzero) digits is 169344, while the sum is 39.

Adding to 20013721234743 its reverse (34743212731002), we get a palindrome (54756933965745).

The spelling of 20013721234743 in words is "twenty trillion, thirteen billion, seven hundred twenty-one million, two hundred thirty-four thousand, seven hundred forty-three".