20430432423 has 12 divisors (see below), whose sum is σ = 31063815640. Its totient is φ = 12903430896.

The previous prime is 20430432383. The next prime is 20430432437. The reversal of 20430432423 is 32423403402.

20430432423 is a `hidden beast` number, since 204 + 3 + 0 + 4 + 32 + 423 = 666.

It is not a de Polignac number, because 20430432423 - 2⁸ = 20430432167 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 (20430432443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59737936 + ... + 59738277.

Almost surely, 2^20430432423 is an apocalyptic number.

20430432423 is a deficient number, since it is larger than the sum of its proper divisors (10633383217).

20430432423 is a wasteful number, since it uses less digits than its factorization.

20430432423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119476238 (or 119476235 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20430432423 its reverse (32423403402), we get a palindrome (52853835825).

The spelling of 20430432423 in words is "twenty billion, four hundred thirty million, four hundred thirty-two thousand, four hundred twenty-three".