20031112311 has 32 divisors (see below), whose sum is σ = 32140492800. Its totient is φ = 10840404960.

The previous prime is 20031112301. The next prime is 20031112369. The reversal of 20031112311 is 11321113002.

It is a happy number.

It is not a de Polignac number, because 20031112311 - 2¹⁹ = 20030588023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031112301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1653406 + ... + 1665476.

It is an arithmetic number, because the mean of its divisors is an integer number (1004390400).

Almost surely, 2^20031112311 is an apocalyptic number.

20031112311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20031112311 is a deficient number, since it is larger than the sum of its proper divisors (12109380489).

20031112311 is a wasteful number, since it uses less digits than its factorization.

20031112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16259.

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

Adding to 20031112311 its reverse (11321113002), we get a palindrome (31352225313).

The spelling of 20031112311 in words is "twenty billion, thirty-one million, one hundred twelve thousand, three hundred eleven".