20312203331 has 8 divisors (see below), whose sum is σ = 23216235264. Its totient is φ = 17408743560.

The previous prime is 20312203291. The next prime is 20312203393. The reversal of 20312203331 is 13330221302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312203331 is a prime.

It is a super-2 number, since 2×20312203331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312203531) 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, 64055 + ... + 211488.

It is an arithmetic number, because the mean of its divisors is an integer number (2902029408).

Almost surely, 2^20312203331 is an apocalyptic number.

20312203331 is a deficient number, since it is larger than the sum of its proper divisors (2904031933).

20312203331 is a wasteful number, since it uses less digits than its factorization.

20312203331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286081.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20312203331 its reverse (13330221302), we get a palindrome (33642424633).

The spelling of 20312203331 in words is "twenty billion, three hundred twelve million, two hundred three thousand, three hundred thirty-one".