20417340673 has 2 divisors, whose sum is σ = 20417340674. Its totient is φ = 20417340672.

The previous prime is 20417340667. The next prime is 20417340689. The reversal of 20417340673 is 37604371402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12930418944 + 7486921729 = 113712^2 + 86527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20417340673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20417340653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10208670336 + 10208670337.

It is an arithmetic number, because the mean of its divisors is an integer number (10208670337).

Almost surely, 2^20417340673 is an apocalyptic number.

It is an amenable number.

20417340673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20417340673 is an equidigital number, since it uses as much as digits as its factorization.

20417340673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 20417340673 in words is "twenty billion, four hundred seventeen million, three hundred forty thousand, six hundred seventy-three".