20321112331 has 4 divisors (see below), whose sum is σ = 21884274832. Its totient is φ = 18757949832.

The previous prime is 20321112323. The next prime is 20321112337. The reversal of 20321112331 is 13321112302.

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 20321112331 - 2³ = 20321112323 is a prime.

It is a super-3 number, since 3×20321112331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321112299 and 20321112308.

It is not an unprimeable number, because it can be changed into a prime (20321112337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781581231 + ... + 781581256.

It is an arithmetic number, because the mean of its divisors is an integer number (5471068708).

Almost surely, 2^20321112331 is an apocalyptic number.

20321112331 is a deficient number, since it is larger than the sum of its proper divisors (1563162501).

20321112331 is a wasteful number, since it uses less digits than its factorization.

20321112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563162500.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20321112331 its reverse (13321112302), we get a palindrome (33642224633).

The spelling of 20321112331 in words is "twenty billion, three hundred twenty-one million, one hundred twelve thousand, three hundred thirty-one".