20205222311 has 4 divisors (see below), whose sum is σ = 20206704792. Its totient is φ = 20203739832.

The previous prime is 20205222299. The next prime is 20205222319. The reversal of 20205222311 is 11322250202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11322250202 = 2 ⋅5661125101.

It is a cyclic number.

It is not a de Polignac number, because 20205222311 - 2¹⁰ = 20205221287 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 (20205222319) 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, 720605 + ... + 748118.

It is an arithmetic number, because the mean of its divisors is an integer number (5051676198).

Almost surely, 2^20205222311 is an apocalyptic number.

20205222311 is a deficient number, since it is larger than the sum of its proper divisors (1482481).

20205222311 is a wasteful number, since it uses less digits than its factorization.

20205222311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482480.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20205222311 its reverse (11322250202), we get a palindrome (31527472513).

The spelling of 20205222311 in words is "twenty billion, two hundred five million, two hundred twenty-two thousand, three hundred eleven".