20404331443 has 4 divisors (see below), whose sum is σ = 20405585088. Its totient is φ = 20403077800.

The previous prime is 20404331411. The next prime is 20404331459. The reversal of 20404331443 is 34413340402.

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 20404331443 - 2⁵ = 20404331411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404335443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602083 + ... + 635068.

It is an arithmetic number, because the mean of its divisors is an integer number (5101396272).

Almost surely, 2^20404331443 is an apocalyptic number.

20404331443 is a deficient number, since it is larger than the sum of its proper divisors (1253645).

20404331443 is a wasteful number, since it uses less digits than its factorization.

20404331443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253644.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20404331443 its reverse (34413340402), we get a palindrome (54817671845).

The spelling of 20404331443 in words is "twenty billion, four hundred four million, three hundred thirty-one thousand, four hundred forty-three".