20204530197 has 4 divisors (see below), whose sum is σ = 26939373600. Its totient is φ = 13469686796.

The previous prime is 20204530189. The next prime is 20204530201. The reversal of 20204530197 is 79103540202.

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 20204530197 - 2³ = 20204530189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204530127) 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, 3367421697 + ... + 3367421702.

It is an arithmetic number, because the mean of its divisors is an integer number (6734843400).

Almost surely, 2^20204530197 is an apocalyptic number.

It is an amenable number.

20204530197 is a deficient number, since it is larger than the sum of its proper divisors (6734843403).

20204530197 is an equidigital number, since it uses as much as digits as its factorization.

20204530197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734843402.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 20204530197 in words is "twenty billion, two hundred four million, five hundred thirty thousand, one hundred ninety-seven".