20423134503433 has 4 divisors (see below), whose sum is σ = 20423530405908. Its totient is φ = 20422738600960.

The previous prime is 20423134503391. The next prime is 20423134503467. The reversal of 20423134503433 is 33430543132402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12194084952009 + 8229049551424 = 3492003^2 + 2868632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423134503433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20423134503392 and 20423134503401.

It is not an unprimeable number, because it can be changed into a prime (20423134506433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197873848 + ... + 197977033.

It is an arithmetic number, because the mean of its divisors is an integer number (5105882601477).

Almost surely, 2^{20423134503433} is an apocalyptic number.

It is an amenable number.

20423134503433 is a deficient number, since it is larger than the sum of its proper divisors (395902475).

20423134503433 is an equidigital number, since it uses as much as digits as its factorization.

20423134503433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395902474.

The product of its (nonzero) digits is 311040, while the sum is 37.

Adding to 20423134503433 its reverse (33430543132402), we get a palindrome (53853677635835).

The spelling of 20423134503433 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-four million, five hundred three thousand, four hundred thirty-three".