20345233304443 has 2 divisors, whose sum is σ = 20345233304444. Its totient is φ = 20345233304442.

The previous prime is 20345233304423. The next prime is 20345233304479. The reversal of 20345233304443 is 34440333254302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20345233304443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20345233304396 and 20345233304405.

It is not a weakly prime, because it can be changed into another prime (20345233304423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172616652221 + 10172616652222.

It is an arithmetic number, because the mean of its divisors is an integer number (10172616652222).

Almost surely, 2^{20345233304443} is an apocalyptic number.

20345233304443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345233304443 is an equidigital number, since it uses as much as digits as its factorization.

20345233304443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 40.

Adding to 20345233304443 its reverse (34440333254302), we get a palindrome (54785566558745).

The spelling of 20345233304443 in words is "twenty trillion, three hundred forty-five billion, two hundred thirty-three million, three hundred four thousand, four hundred forty-three".