20423041420143 has 16 divisors (see below), whose sum is σ = 27276371010560. Its totient is φ = 13592537686656.

The previous prime is 20423041420129. The next prime is 20423041420163. The reversal of 20423041420143 is 34102414032402.

It is not a de Polignac number, because 20423041420143 - 2⁸ = 20423041419887 is a prime.

It is a super-2 number, since 2×20423041420143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20423041420143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423041420163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71621496 + ... + 71906082.

It is an arithmetic number, because the mean of its divisors is an integer number (1704773188160).

Almost surely, 2^{20423041420143} is an apocalyptic number.

20423041420143 is a deficient number, since it is larger than the sum of its proper divisors (6853329590417).

20423041420143 is a wasteful number, since it uses less digits than its factorization.

20423041420143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324606.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20423041420143 its reverse (34102414032402), we get a palindrome (54525455452545).

The spelling of 20423041420143 in words is "twenty trillion, four hundred twenty-three billion, forty-one million, four hundred twenty thousand, one hundred forty-three".