20323143443 has 4 divisors (see below), whose sum is σ = 20323471848. Its totient is φ = 20322815040.

The previous prime is 20323143431. The next prime is 20323143469. The reversal of 20323143443 is 34434132302.

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 20323143443 - 2²⁸ = 20054707987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323140443) 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 3 ways as a sum of consecutive naturals, for example, 40121 + ... + 205562.

It is an arithmetic number, because the mean of its divisors is an integer number (5080867962).

Almost surely, 2^20323143443 is an apocalyptic number.

20323143443 is a deficient number, since it is larger than the sum of its proper divisors (328405).

20323143443 is an equidigital number, since it uses as much as digits as its factorization.

20323143443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328404.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 20323143443 its reverse (34434132302), we get a palindrome (54757275745).

The spelling of 20323143443 in words is "twenty billion, three hundred twenty-three million, one hundred forty-three thousand, four hundred forty-three".