20005431443 has 8 divisors (see below), whose sum is σ = 20493784512. Its totient is φ = 19522659816.

The previous prime is 20005431437. The next prime is 20005431497. The reversal of 20005431443 is 34413450002.

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

It is a cyclic number.

It is not a de Polignac number, because 20005431443 - 2²⁸ = 19736995987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20005401443) 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, 1388105 + ... + 1402442.

It is an arithmetic number, because the mean of its divisors is an integer number (2561723064).

Almost surely, 2^20005431443 is an apocalyptic number.

20005431443 is a deficient number, since it is larger than the sum of its proper divisors (488353069).

20005431443 is a wasteful number, since it uses less digits than its factorization.

20005431443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790721.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20005431443 its reverse (34413450002), we get a palindrome (54418881445).

The spelling of 20005431443 in words is "twenty billion, five million, four hundred thirty-one thousand, four hundred forty-three".