20443431009 has 8 divisors (see below), whose sum is σ = 27399141472. Its totient is φ = 13558337280.

The previous prime is 20443430963. The next prime is 20443431023. The reversal of 20443431009 is 90013434402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20443431009 - 2²⁵ = 20409876577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443431059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17653507 + ... + 17654664.

It is an arithmetic number, because the mean of its divisors is an integer number (3424892684).

Almost surely, 2^20443431009 is an apocalyptic number.

It is an amenable number.

20443431009 is a deficient number, since it is larger than the sum of its proper divisors (6955710463).

20443431009 is a wasteful number, since it uses less digits than its factorization.

20443431009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35308367.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20443431009 in words is "twenty billion, four hundred forty-three million, four hundred thirty-one thousand, nine".