20320331111 has 8 divisors (see below), whose sum is σ = 21229421280. Its totient is φ = 19413374112.

The previous prime is 20320331093. The next prime is 20320331191. The reversal of 20320331111 is 11113302302.

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

It is not a de Polignac number, because 20320331111 - 2³⁴ = 3140461927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20320331111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320331191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513800 + ... + 551933.

It is an arithmetic number, because the mean of its divisors is an integer number (2653677660).

Almost surely, 2^20320331111 is an apocalyptic number.

20320331111 is a deficient number, since it is larger than the sum of its proper divisors (909090169).

20320331111 is a wasteful number, since it uses less digits than its factorization.

20320331111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066585.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20320331111 its reverse (11113302302), we get a palindrome (31433633413).

The spelling of 20320331111 in words is "twenty billion, three hundred twenty million, three hundred thirty-one thousand, one hundred eleven".