20430323663 has 4 divisors (see below), whose sum is σ = 20488200288. Its totient is φ = 20372447040.

The previous prime is 20430323659. The next prime is 20430323677. The reversal of 20430323663 is 36632303402.

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 20430323663 - 2² = 20430323659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430323653) 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, 28937783 + ... + 28938488.

It is an arithmetic number, because the mean of its divisors is an integer number (5122050072).

Almost surely, 2^20430323663 is an apocalyptic number.

20430323663 is a deficient number, since it is larger than the sum of its proper divisors (57876625).

20430323663 is an equidigital number, since it uses as much as digits as its factorization.

20430323663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57876624.

The product of its (nonzero) digits is 46656, while the sum is 32.

The spelling of 20430323663 in words is "twenty billion, four hundred thirty million, three hundred twenty-three thousand, six hundred sixty-three".