20313213111 has 12 divisors (see below), whose sum is σ = 29528197192. Its totient is φ = 13455885456.

The previous prime is 20313213049. The next prime is 20313213127. The reversal of 20313213111 is 11131231302.

20313213111 is a `hidden beast` number, since 2 + 0 + 31 + 321 + 311 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20313213111 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 (20313213211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7186561 + ... + 7189386.

Almost surely, 2^20313213111 is an apocalyptic number.

20313213111 is a deficient number, since it is larger than the sum of its proper divisors (9214984081).

20313213111 is a wasteful number, since it uses less digits than its factorization.

20313213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14376110 (or 14376107 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20313213111 its reverse (11131231302), we get a palindrome (31444444413).

The spelling of 20313213111 in words is "twenty billion, three hundred thirteen million, two hundred thirteen thousand, one hundred eleven".