20331112313291 has 16 divisors (see below), whose sum is σ = 21921621225504. Its totient is φ = 18744402219264.

The previous prime is 20331112313279. The next prime is 20331112313311. The reversal of 20331112313291 is 19231321113302.

It is a cyclic number.

It is not a de Polignac number, because 20331112313291 - 2⁴² = 15933065802187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20331112313231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444246776 + ... + 444292538.

It is an arithmetic number, because the mean of its divisors is an integer number (1370101326594).

Almost surely, 2^{20331112313291} is an apocalyptic number.

20331112313291 is a deficient number, since it is larger than the sum of its proper divisors (1590508912213).

20331112313291 is a wasteful number, since it uses less digits than its factorization.

20331112313291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86510.

The product of its (nonzero) digits is 5832, while the sum is 32.

Adding to 20331112313291 its reverse (19231321113302), we get a palindrome (39562433426593).

The spelling of 20331112313291 in words is "twenty trillion, three hundred thirty-one billion, one hundred twelve million, three hundred thirteen thousand, two hundred ninety-one".