20131304233243 has 16 divisors (see below), whose sum is σ = 23833169196480. Its totient is φ = 16645387968000.

The previous prime is 20131304233213. The next prime is 20131304233297. The reversal of 20131304233243 is 34233240313102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20131304233243 - 2¹⁷ = 20131304102171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131304233213) 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, 394041408 + ... + 394092493.

It is an arithmetic number, because the mean of its divisors is an integer number (1489573074780).

Almost surely, 2^{20131304233243} is an apocalyptic number.

20131304233243 is a deficient number, since it is larger than the sum of its proper divisors (3701864963237).

20131304233243 is an equidigital number, since it uses as much as digits as its factorization.

20131304233243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788134038.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 20131304233243 its reverse (34233240313102), we get a palindrome (54364544546345).

The spelling of 20131304233243 in words is "twenty trillion, one hundred thirty-one billion, three hundred four million, two hundred thirty-three thousand, two hundred forty-three".