20243434343 has 16 divisors (see below), whose sum is σ = 22776975360. Its totient is φ = 17833188000.

The previous prime is 20243434247. The next prime is 20243434357. The reversal of 20243434343 is 34343434202.

It is a cyclic number.

It is not a de Polignac number, because 20243434343 - 2⁸ = 20243434087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243434243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141623 + ... + 246056.

It is an arithmetic number, because the mean of its divisors is an integer number (1423560960).

Almost surely, 2^20243434343 is an apocalyptic number.

20243434343 is a deficient number, since it is larger than the sum of its proper divisors (2533541017).

20243434343 is a wasteful number, since it uses less digits than its factorization.

20243434343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387838.

The product of its (nonzero) digits is 82944, while the sum is 32.

Adding to 20243434343 its reverse (34343434202), we get a palindrome (54586868545).

The spelling of 20243434343 in words is "twenty billion, two hundred forty-three million, four hundred thirty-four thousand, three hundred forty-three".