20304310211 has 4 divisors (see below), whose sum is σ = 20305013400. Its totient is φ = 20303607024.

The previous prime is 20304310177. The next prime is 20304310259. The reversal of 20304310211 is 11201340302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20304310211 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 20304310211.

It is not an unprimeable number, because it can be changed into a prime (20304310261) 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, 306341 + ... + 366678.

It is an arithmetic number, because the mean of its divisors is an integer number (5076253350).

Almost surely, 2^20304310211 is an apocalyptic number.

20304310211 is a deficient number, since it is larger than the sum of its proper divisors (703189).

20304310211 is an equidigital number, since it uses as much as digits as its factorization.

20304310211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703188.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20304310211 its reverse (11201340302), we get a palindrome (31505650513).

The spelling of 20304310211 in words is "twenty billion, three hundred four million, three hundred ten thousand, two hundred eleven".