20954514607217 has 2 divisors, whose sum is σ = 20954514607218. Its totient is φ = 20954514607216.

The previous prime is 20954514607111. The next prime is 20954514607237. The reversal of 20954514607217 is 71270641545902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12981097379041 + 7973417228176 = 3602929^2 + 2823724^2 .

It is a cyclic number.

It is not a de Polignac number, because 20954514607217 - 2³⁶ = 20885795130481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20954514607237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477257303608 + 10477257303609.

It is an arithmetic number, because the mean of its divisors is an integer number (10477257303609).

Almost surely, 2^{20954514607217} is an apocalyptic number.

It is an amenable number.

20954514607217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20954514607217 is an equidigital number, since it uses as much as digits as its factorization.

20954514607217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 20954514607217 in words is "twenty trillion, nine hundred fifty-four billion, five hundred fourteen million, six hundred seven thousand, two hundred seventeen".