20058009817 has 2 divisors, whose sum is σ = 20058009818. Its totient is φ = 20058009816.

The previous prime is 20058009731. The next prime is 20058009821. The reversal of 20058009817 is 71890085002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16838695696 + 3219314121 = 129764^2 + 56739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20058009817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20058009817.

It is not a weakly prime, because it can be changed into another prime (20058003817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10029004908 + 10029004909.

It is an arithmetic number, because the mean of its divisors is an integer number (10029004909).

Almost surely, 2^20058009817 is an apocalyptic number.

It is an amenable number.

20058009817 is a deficient number, since it is larger than the sum of its proper divisors (1).

20058009817 is an equidigital number, since it uses as much as digits as its factorization.

20058009817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 20058009817 in words is "twenty billion, fifty-eight million, nine thousand, eight hundred seventeen".