20616231311 has 8 divisors (see below), whose sum is σ = 22203216000. Its totient is φ = 19029406752.

The previous prime is 20616231281. The next prime is 20616231331. The reversal of 20616231311 is 11313261602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20616231311 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 (20616231331) 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, 445961 + ... + 490013.

It is an arithmetic number, because the mean of its divisors is an integer number (2775402000).

Almost surely, 2^20616231311 is an apocalyptic number.

20616231311 is a deficient number, since it is larger than the sum of its proper divisors (1586984689).

20616231311 is a wasteful number, since it uses less digits than its factorization.

20616231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80065.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 20616231311 its reverse (11313261602), we get a palindrome (31929492913).

The spelling of 20616231311 in words is "twenty billion, six hundred sixteen million, two hundred thirty-one thousand, three hundred eleven".