20131244113243 has 4 divisors (see below), whose sum is σ = 20151849277080. Its totient is φ = 20110638949408.

The previous prime is 20131244113241. The next prime is 20131244113327. The reversal of 20131244113243 is 34231144213102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20131244113243 - 2¹ = 20131244113241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131244113241) 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, 10302580453 + ... + 10302582406.

It is an arithmetic number, because the mean of its divisors is an integer number (5037962319270).

Almost surely, 2^{20131244113243} is an apocalyptic number.

20131244113243 is a deficient number, since it is larger than the sum of its proper divisors (20605163837).

20131244113243 is an equidigital number, since it uses as much as digits as its factorization.

20131244113243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20605163836.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 20131244113243 its reverse (34231144213102), we get a palindrome (54362388326345).

The spelling of 20131244113243 in words is "twenty trillion, one hundred thirty-one billion, two hundred forty-four million, one hundred thirteen thousand, two hundred forty-three".