20006017897 has 2 divisors, whose sum is σ = 20006017898. Its totient is φ = 20006017896.

The previous prime is 20006017861. The next prime is 20006017901. The reversal of 20006017897 is 79871060002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18658467216 + 1347550681 = 136596^2 + 36709^2 .

It is a cyclic number.

It is not a de Polignac number, because 20006017897 - 2¹¹ = 20006015849 is a prime.

It is not a weakly prime, because it can be changed into another prime (20006017817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10003008948 + 10003008949.

It is an arithmetic number, because the mean of its divisors is an integer number (10003008949).

Almost surely, 2^20006017897 is an apocalyptic number.

It is an amenable number.

20006017897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20006017897 is an equidigital number, since it uses as much as digits as its factorization.

20006017897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

Adding to 20006017897 its reverse (79871060002), we get a palindrome (99877077899).

The spelling of 20006017897 in words is "twenty billion, six million, seventeen thousand, eight hundred ninety-seven".