20443431011 has 4 divisors (see below), whose sum is σ = 20473363512. Its totient is φ = 20413498512.

The previous prime is 20443430963. The next prime is 20443431023. The reversal of 20443431011 is 11013434402.

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 20443431011 - 2²² = 20439236707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443431061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14965226 + ... + 14966591.

It is an arithmetic number, because the mean of its divisors is an integer number (5118340878).

Almost surely, 2^20443431011 is an apocalyptic number.

20443431011 is a deficient number, since it is larger than the sum of its proper divisors (29932501).

20443431011 is an equidigital number, since it uses as much as digits as its factorization.

20443431011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29932500.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20443431011 its reverse (11013434402), we get a palindrome (31456865413).

The spelling of 20443431011 in words is "twenty billion, four hundred forty-three million, four hundred thirty-one thousand, eleven".