20312310111 has 4 divisors (see below), whose sum is σ = 27083080152. Its totient is φ = 13541540072.

The previous prime is 20312310103. The next prime is 20312310131. The reversal of 20312310111 is 11101321302.

It is a happy number.

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 20312310111 - 2³ = 20312310103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312310131) 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 3 ways as a sum of consecutive naturals, for example, 3385385016 + ... + 3385385021.

It is an arithmetic number, because the mean of its divisors is an integer number (6770770038).

Almost surely, 2^20312310111 is an apocalyptic number.

20312310111 is a deficient number, since it is larger than the sum of its proper divisors (6770770041).

20312310111 is an equidigital number, since it uses as much as digits as its factorization.

20312310111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770770040.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20312310111 its reverse (11101321302), we get a palindrome (31413631413).

The spelling of 20312310111 in words is "twenty billion, three hundred twelve million, three hundred ten thousand, one hundred eleven".