20423430223 has 16 divisors (see below), whose sum is σ = 23410791936. Its totient is φ = 17453576160.

The previous prime is 20423430217. The next prime is 20423430259. The reversal of 20423430223 is 32203432402.

It is a cyclic number.

It is not a de Polignac number, because 20423430223 - 2²⁹ = 19886559311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423430263) 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, 4543365 + ... + 4547857.

It is an arithmetic number, because the mean of its divisors is an integer number (1463174496).

Almost surely, 2^20423430223 is an apocalyptic number.

20423430223 is a deficient number, since it is larger than the sum of its proper divisors (2987361713).

20423430223 is a wasteful number, since it uses less digits than its factorization.

20423430223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 20423430223 its reverse (32203432402), we get a palindrome (52626862625).

The spelling of 20423430223 in words is "twenty billion, four hundred twenty-three million, four hundred thirty thousand, two hundred twenty-three".