20423142534303 has 12 divisors (see below), whose sum is σ = 29503581478488. Its totient is φ = 13613819106960.

The previous prime is 20423142534281. The next prime is 20423142534341. The reversal of 20423142534303 is 30343524132402.

20423142534303 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 314 + 2 + 5 + 34 + 303 = 666.

It is not a de Polignac number, because 20423142534303 - 2⁵ = 20423142534271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423142534373) 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 11 ways as a sum of consecutive naturals, for example, 134023725 + ... + 134176022.

It is an arithmetic number, because the mean of its divisors is an integer number (2458631789874).

Almost surely, 2^{20423142534303} is an apocalyptic number.

20423142534303 is a deficient number, since it is larger than the sum of its proper divisors (9080438944185).

20423142534303 is a wasteful number, since it uses less digits than its factorization.

20423142534303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268208214 (or 268208211 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 36.

Adding to 20423142534303 its reverse (30343524132402), we get a palindrome (50766666666705).

The spelling of 20423142534303 in words is "twenty trillion, four hundred twenty-three billion, one hundred forty-two million, five hundred thirty-four thousand, three hundred three".