20411717 has 2 divisors, whose sum is σ = 20411718. Its totient is φ = 20411716.

The previous prime is 20411707. The next prime is 20411723. The reversal of 20411717 is 71711402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17422276 + 2989441 = 4174^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411717 - 2²² = 16217413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20411692 and 20411701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20411707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205858 + 10205859.

It is an arithmetic number, because the mean of its divisors is an integer number (10205859).

Almost surely, 2^20411717 is an apocalyptic number.

It is an amenable number.

20411717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411717 is an equidigital number, since it uses as much as digits as its factorization.

20411717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 20411717 is about 4517.9328237591. The cubic root of 20411717 is about 273.2917444490.

The spelling of 20411717 in words is "twenty million, four hundred eleven thousand, seven hundred seventeen".