20522205097 has 4 divisors (see below), whose sum is σ = 20523011796. Its totient is φ = 20521398400.

The previous prime is 20522205073. The next prime is 20522205107. The reversal of 20522205097 is 79050222502.

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 7803778921 + 12718426176 = 88339^2 + 112776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20522205097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522205037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363904 + ... + 416497.

It is an arithmetic number, because the mean of its divisors is an integer number (5130752949).

Almost surely, 2^20522205097 is an apocalyptic number.

It is an amenable number.

20522205097 is a deficient number, since it is larger than the sum of its proper divisors (806699).

20522205097 is an equidigital number, since it uses as much as digits as its factorization.

20522205097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806698.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 20522205097 its reverse (79050222502), we get a palindrome (99572427599).

The spelling of 20522205097 in words is "twenty billion, five hundred twenty-two million, two hundred five thousand, ninety-seven".