20201022197 has 4 divisors (see below), whose sum is σ = 20205743040. Its totient is φ = 20196301356.

The previous prime is 20201022181. The next prime is 20201022203. The reversal of 20201022197 is 79122010202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20201022197 - 2⁴ = 20201022181 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 (20201022397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353997 + ... + 2362562.

It is an arithmetic number, because the mean of its divisors is an integer number (5051435760).

Almost surely, 2^20201022197 is an apocalyptic number.

It is an amenable number.

20201022197 is a deficient number, since it is larger than the sum of its proper divisors (4720843).

20201022197 is an equidigital number, since it uses as much as digits as its factorization.

20201022197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720842.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 20201022197 its reverse (79122010202), we get a palindrome (99323032399).

The spelling of 20201022197 in words is "twenty billion, two hundred one million, twenty-two thousand, one hundred ninety-seven".