20522205311 has 4 divisors (see below), whose sum is σ = 21602321400. Its totient is φ = 19442089224.

The previous prime is 20522205283. The next prime is 20522205343. The reversal of 20522205311 is 11350222502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20522205311 - 2⁶ = 20522205247 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 (20522205211) 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, 540058016 + ... + 540058053.

It is an arithmetic number, because the mean of its divisors is an integer number (5400580350).

Almost surely, 2^20522205311 is an apocalyptic number.

20522205311 is a deficient number, since it is larger than the sum of its proper divisors (1080116089).

20522205311 is a wasteful number, since it uses less digits than its factorization.

20522205311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080116088.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20522205311 its reverse (11350222502), we get a palindrome (31872427813).

The spelling of 20522205311 in words is "twenty billion, five hundred twenty-two million, two hundred five thousand, three hundred eleven".