20443123434343 has 4 divisors (see below), whose sum is σ = 20448848199448. Its totient is φ = 20437398669240.

The previous prime is 20443123434301. The next prime is 20443123434403. The reversal of 20443123434343 is 34343432134402.

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 20443123434343 - 2¹⁷ = 20443123303271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20443123434296 and 20443123434305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443123444343) 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, 2862377196 + ... + 2862384337.

It is an arithmetic number, because the mean of its divisors is an integer number (5112212049862).

Almost surely, 2^{20443123434343} is an apocalyptic number.

20443123434343 is a deficient number, since it is larger than the sum of its proper divisors (5724765105).

20443123434343 is an equidigital number, since it uses as much as digits as its factorization.

20443123434343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724765104.

The product of its (nonzero) digits is 995328, while the sum is 40.

Adding to 20443123434343 its reverse (34343432134402), we get a palindrome (54786555568745).

The spelling of 20443123434343 in words is "twenty trillion, four hundred forty-three billion, one hundred twenty-three million, four hundred thirty-four thousand, three hundred forty-three".