20423423142323 has 2 divisors, whose sum is σ = 20423423142324. Its totient is φ = 20423423142322.

The previous prime is 20423423142299. The next prime is 20423423142401. The reversal of 20423423142323 is 32324132432402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423423142323 - 2⁶ = 20423423142259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20423423142223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211711571161 + 10211711571162.

It is an arithmetic number, because the mean of its divisors is an integer number (10211711571162).

Almost surely, 2^{20423423142323} is an apocalyptic number.

20423423142323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423423142323 is an equidigital number, since it uses as much as digits as its factorization.

20423423142323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 20423423142323 its reverse (32324132432402), we get a palindrome (52747555574725).

The spelling of 20423423142323 in words is "twenty trillion, four hundred twenty-three billion, four hundred twenty-three million, one hundred forty-two thousand, three hundred twenty-three".