20430221443 has 16 divisors (see below), whose sum is σ = 21093765984. Its totient is φ = 19779701760.

The previous prime is 20430221437. The next prime is 20430221473. The reversal of 20430221443 is 34412203402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20430221443 - 2⁵ = 20430221411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430221473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014771 + ... + 1034707.

It is an arithmetic number, because the mean of its divisors is an integer number (1318360374).

Almost surely, 2^20430221443 is an apocalyptic number.

20430221443 is a deficient number, since it is larger than the sum of its proper divisors (663544541).

20430221443 is a wasteful number, since it uses less digits than its factorization.

20430221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20262.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20430221443 its reverse (34412203402), we get a palindrome (54842424845).

The spelling of 20430221443 in words is "twenty billion, four hundred thirty million, two hundred twenty-one thousand, four hundred forty-three".