20304310431211 has 4 divisors (see below), whose sum is σ = 21004459066800. Its totient is φ = 19604161795624.

The previous prime is 20304310431187. The next prime is 20304310431217. The reversal of 20304310431211 is 11213401340302.

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 20304310431211 - 2²⁷ = 20304176213483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304310431217) 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, 350074317751 + ... + 350074317808.

It is an arithmetic number, because the mean of its divisors is an integer number (5251114766700).

Almost surely, 2^{20304310431211} is an apocalyptic number.

20304310431211 is a deficient number, since it is larger than the sum of its proper divisors (700148635589).

20304310431211 is an equidigital number, since it uses as much as digits as its factorization.

20304310431211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700148635588.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20304310431211 its reverse (11213401340302), we get a palindrome (31517711771513).

Subtracting from 20304310431211 its reverse (11213401340302), we obtain a palindrome (9090909090909).

The spelling of 20304310431211 in words is "twenty trillion, three hundred four billion, three hundred ten million, four hundred thirty-one thousand, two hundred eleven".