20331434312443 has 4 divisors (see below), whose sum is σ = 20331508061848. Its totient is φ = 20331360563040.

The previous prime is 20331434312429. The next prime is 20331434312459. The reversal of 20331434312443 is 34421343413302.

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 20331434312443 - 2²⁹ = 20330897441531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331434318443) 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, 36459621 + ... + 37013062.

It is an arithmetic number, because the mean of its divisors is an integer number (5082877015462).

Almost surely, 2^{20331434312443} is an apocalyptic number.

20331434312443 is a deficient number, since it is larger than the sum of its proper divisors (73749405).

20331434312443 is an equidigital number, since it uses as much as digits as its factorization.

20331434312443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73749404.

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 20331434312443 its reverse (34421343413302), we get a palindrome (54752777725745).

The spelling of 20331434312443 in words is "twenty trillion, three hundred thirty-one billion, four hundred thirty-four million, three hundred twelve thousand, four hundred forty-three".