20020200197 has 4 divisors (see below), whose sum is σ = 20028603840. Its totient is φ = 20011796556.

The previous prime is 20020200139. The next prime is 20020200217. The reversal of 20020200197 is 79100202002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79100202002 = 2 ⋅39550101001.

It is a cyclic number.

It is not a de Polignac number, because 20020200197 - 2⁶ = 20020200133 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 (20020200097) 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, 4198247 + ... + 4203012.

It is an arithmetic number, because the mean of its divisors is an integer number (5007150960).

Almost surely, 2^20020200197 is an apocalyptic number.

It is an amenable number.

20020200197 is a deficient number, since it is larger than the sum of its proper divisors (8403643).

20020200197 is an equidigital number, since it uses as much as digits as its factorization.

20020200197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8403642.

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

Adding to 20020200197 its reverse (79100202002), we get a palindrome (99120402199).

The spelling of 20020200197 in words is "twenty billion, twenty million, two hundred thousand, one hundred ninety-seven".