20020110197 has 4 divisors (see below), whose sum is σ = 21197763756. Its totient is φ = 18842456640.

The previous prime is 20020110181. The next prime is 20020110223. The reversal of 20020110197 is 79101102002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16169411281 + 3850698916 = 127159^2 + 62054^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020110197 - 2⁴ = 20020110181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020110137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588826754 + ... + 588826787.

It is an arithmetic number, because the mean of its divisors is an integer number (5299440939).

Almost surely, 2^20020110197 is an apocalyptic number.

It is an amenable number.

20020110197 is a deficient number, since it is larger than the sum of its proper divisors (1177653559).

20020110197 is a wasteful number, since it uses less digits than its factorization.

20020110197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177653558.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 20020110197 its reverse (79101102002), we get a palindrome (99121212199).

The spelling of 20020110197 in words is "twenty billion, twenty million, one hundred ten thousand, one hundred ninety-seven".