20204325497 has 4 divisors (see below), whose sum is σ = 20232823140. Its totient is φ = 20175827856.

The previous prime is 20204325481. The next prime is 20204325523. The reversal of 20204325497 is 79452340202.

It is a happy number.

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 1340951161 + 18863374336 = 36619^2 + 137344^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204325497 - 2⁴ = 20204325481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20204325497.

It is not an unprimeable number, because it can be changed into a prime (20204325457) 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, 14247758 + ... + 14249175.

It is an arithmetic number, because the mean of its divisors is an integer number (5058205785).

Almost surely, 2^20204325497 is an apocalyptic number.

It is an amenable number.

20204325497 is a deficient number, since it is larger than the sum of its proper divisors (28497643).

20204325497 is an equidigital number, since it uses as much as digits as its factorization.

20204325497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28497642.

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 20204325497 its reverse (79452340202), we get a palindrome (99656665699).

The spelling of 20204325497 in words is "twenty billion, two hundred four million, three hundred twenty-five thousand, four hundred ninety-seven".