20134423 has 2 divisors, whose sum is σ = 20134424. Its totient is φ = 20134422.

The previous prime is 20134417. The next prime is 20134463. The reversal of 20134423 is 32443102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20134423 - 2⁵ = 20134391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20134423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20134463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067211 + 10067212.

It is an arithmetic number, because the mean of its divisors is an integer number (10067212).

Almost surely, 2^20134423 is an apocalyptic number.

20134423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134423 is an equidigital number, since it uses as much as digits as its factorization.

20134423 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.

The square root of 20134423 is about 4487.1397348422. The cubic root of 20134423 is about 272.0485378706.

Adding to 20134423 its reverse (32443102), we get a palindrome (52577525).

The spelling of 20134423 in words is "twenty million, one hundred thirty-four thousand, four hundred twenty-three".