20430366443 has 4 divisors (see below), whose sum is σ = 20905491288. Its totient is φ = 19955241600.

The previous prime is 20430366433. The next prime is 20430366457. The reversal of 20430366443 is 34466303402.

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 20430366443 - 2¹⁰ = 20430365419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20430366433) 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, 237562358 + ... + 237562443.

It is an arithmetic number, because the mean of its divisors is an integer number (5226372822).

Almost surely, 2^20430366443 is an apocalyptic number.

20430366443 is a deficient number, since it is larger than the sum of its proper divisors (475124845).

20430366443 is an equidigital number, since it uses as much as digits as its factorization.

20430366443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475124844.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 20430366443 its reverse (34466303402), we get a palindrome (54896669845).

The spelling of 20430366443 in words is "twenty billion, four hundred thirty million, three hundred sixty-six thousand, four hundred forty-three".