20302231320311 has 4 divisors (see below), whose sum is σ = 20850940274952. Its totient is φ = 19753522365672.

The previous prime is 20302231320307. The next prime is 20302231320323. The reversal of 20302231320311 is 11302313220302.

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

It is not a de Polignac number, because 20302231320311 - 2² = 20302231320307 is a prime.

It is a super-2 number, since 2×20302231320311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302231320011) 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, 274354477265 + ... + 274354477338.

It is an arithmetic number, because the mean of its divisors is an integer number (5212735068738).

Almost surely, 2^{20302231320311} is an apocalyptic number.

20302231320311 is a deficient number, since it is larger than the sum of its proper divisors (548708954641).

20302231320311 is an equidigital number, since it uses as much as digits as its factorization.

20302231320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548708954640.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20302231320311 its reverse (11302313220302), we get a palindrome (31604544540613).

The spelling of 20302231320311 in words is "twenty trillion, three hundred two billion, two hundred thirty-one million, three hundred twenty thousand, three hundred eleven".