20020023197 has 2 divisors, whose sum is σ = 20020023198. Its totient is φ = 20020023196.

The previous prime is 20020023181. The next prime is 20020023253. The reversal of 20020023197 is 79132002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15096053956 + 4923969241 = 122866^2 + 70171^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020023197 - 2⁴ = 20020023181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020023137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010011598 + 10010011599.

It is an arithmetic number, because the mean of its divisors is an integer number (10010011599).

Almost surely, 2^20020023197 is an apocalyptic number.

It is an amenable number.

20020023197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020023197 is an equidigital number, since it uses as much as digits as its factorization.

20020023197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 20020023197 its reverse (79132002002), we get a palindrome (99152025199).

The spelling of 20020023197 in words is "twenty billion, twenty million, twenty-three thousand, one hundred ninety-seven".