20416543016123 has 2 divisors, whose sum is σ = 20416543016124. Its totient is φ = 20416543016122.

The previous prime is 20416543016117. The next prime is 20416543016179. The reversal of 20416543016123 is 32161034561402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20416543016123 is a prime.

It is a super-2 number, since 2×20416543016123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20416543015123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10208271508061 + 10208271508062.

It is an arithmetic number, because the mean of its divisors is an integer number (10208271508062).

Almost surely, 2^{20416543016123} is an apocalyptic number.

20416543016123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20416543016123 is an equidigital number, since it uses as much as digits as its factorization.

20416543016123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 20416543016123 its reverse (32161034561402), we get a palindrome (52577577577525).

The spelling of 20416543016123 in words is "twenty trillion, four hundred sixteen billion, five hundred forty-three million, sixteen thousand, one hundred twenty-three".