20424344042123 has 16 divisors (see below), whose sum is σ = 23518733619456. Its totient is φ = 17374470491040.

The previous prime is 20424344042117. The next prime is 20424344042147. The reversal of 20424344042123 is 32124044342402.

It is a cyclic number.

It is not a de Polignac number, because 20424344042123 - 2⁶ = 20424344042059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424344042183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14296613 + ... + 15660198.

It is an arithmetic number, because the mean of its divisors is an integer number (1469920851216).

Almost surely, 2^{20424344042123} is an apocalyptic number.

20424344042123 is a deficient number, since it is larger than the sum of its proper divisors (3094389577333).

20424344042123 is a wasteful number, since it uses less digits than its factorization.

20424344042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29957554.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 20424344042123 its reverse (32124044342402), we get a palindrome (52548388384525).

The spelling of 20424344042123 in words is "twenty trillion, four hundred twenty-four billion, three hundred forty-four million, forty-two thousand, one hundred twenty-three".