20423143303523 has 2 divisors, whose sum is σ = 20423143303524. Its totient is φ = 20423143303522.

The previous prime is 20423143303499. The next prime is 20423143303531. The reversal of 20423143303523 is 32530334132402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20423143303523 - 2⁸ = 20423143303267 is a prime.

It is not a weakly prime, because it can be changed into another prime (20423143303543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211571651761 + 10211571651762.

It is an arithmetic number, because the mean of its divisors is an integer number (10211571651762).

Almost surely, 2^{20423143303523} is an apocalyptic number.

20423143303523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423143303523 is an equidigital number, since it uses as much as digits as its factorization.

20423143303523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 35.

Adding to 20423143303523 its reverse (32530334132402), we get a palindrome (52953477435925).

The spelling of 20423143303523 in words is "twenty trillion, four hundred twenty-three billion, one hundred forty-three million, three hundred three thousand, five hundred twenty-three".