20313111311 has 8 divisors (see below), whose sum is σ = 20512309104. Its totient is φ = 20114254720.

The previous prime is 20313111307. The next prime is 20313111341. The reversal of 20313111311 is 11311131302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20313111311 - 2² = 20313111307 is a prime.

It is a super-2 number, since 2×20313111311² (a number of 21 digits) contains 22 as substring.

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 20313111311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313111341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35180 + ... + 204606.

It is an arithmetic number, because the mean of its divisors is an integer number (2564038638).

Almost surely, 2^20313111311 is an apocalyptic number.

20313111311 is a deficient number, since it is larger than the sum of its proper divisors (199197793).

20313111311 is a wasteful number, since it uses less digits than its factorization.

20313111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170601.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 20313111311 its reverse (11311131302), we get a palindrome (31624242613).

The spelling of 20313111311 in words is "twenty billion, three hundred thirteen million, one hundred eleven thousand, three hundred eleven".