20430202423 has 2 divisors, whose sum is σ = 20430202424. Its totient is φ = 20430202422.

The previous prime is 20430202417. The next prime is 20430202511. The reversal of 20430202423 is 32420203402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20430202423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20430202394 and 20430202403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20430202223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215101211 + 10215101212.

It is an arithmetic number, because the mean of its divisors is an integer number (10215101212).

Almost surely, 2^20430202423 is an apocalyptic number.

20430202423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430202423 is an equidigital number, since it uses as much as digits as its factorization.

20430202423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20430202423 its reverse (32420203402), we get a palindrome (52850405825).

The spelling of 20430202423 in words is "twenty billion, four hundred thirty million, two hundred two thousand, four hundred twenty-three".