20045324443 has 4 divisors (see below), whose sum is σ = 20178075088. Its totient is φ = 19912573800.

The previous prime is 20045324441. The next prime is 20045324489. The reversal of 20045324443 is 34442354002.

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 20045324443 - 2¹ = 20045324441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045324441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66375096 + ... + 66375397.

It is an arithmetic number, because the mean of its divisors is an integer number (5044518772).

Almost surely, 2^20045324443 is an apocalyptic number.

20045324443 is a deficient number, since it is larger than the sum of its proper divisors (132750645).

20045324443 is a wasteful number, since it uses less digits than its factorization.

20045324443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132750644.

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 20045324443 its reverse (34442354002), we get a palindrome (54487678445).

The spelling of 20045324443 in words is "twenty billion, forty-five million, three hundred twenty-four thousand, four hundred forty-three".