20423210023 has 2 divisors, whose sum is σ = 20423210024. Its totient is φ = 20423210022.

The previous prime is 20423209999. The next prime is 20423210053. The reversal of 20423210023 is 32001232402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423210023 - 2⁹ = 20423209511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423210053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211605011 + 10211605012.

It is an arithmetic number, because the mean of its divisors is an integer number (10211605012).

Almost surely, 2^20423210023 is an apocalyptic number.

20423210023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423210023 is an equidigital number, since it uses as much as digits as its factorization.

20423210023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20423210023 its reverse (32001232402), we get a palindrome (52424442425).

The spelling of 20423210023 in words is "twenty billion, four hundred twenty-three million, two hundred ten thousand, twenty-three".