20200020197 has 4 divisors (see below), whose sum is σ = 23085737376. Its totient is φ = 17314303020.

The previous prime is 20200020163. The next prime is 20200020257. The reversal of 20200020197 is 79102000202.

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 not a de Polignac number, because 20200020197 - 2⁸ = 20200019941 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 (20200023197) 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, 1442858579 + ... + 1442858592.

It is an arithmetic number, because the mean of its divisors is an integer number (5771434344).

Almost surely, 2^20200020197 is an apocalyptic number.

It is an amenable number.

20200020197 is a deficient number, since it is larger than the sum of its proper divisors (2885717179).

20200020197 is an equidigital number, since it uses as much as digits as its factorization.

20200020197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885717178.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 20200020197 its reverse (79102000202), we get a palindrome (99302020399).

The spelling of 20200020197 in words is "twenty billion, two hundred million, twenty thousand, one hundred ninety-seven".