20320332231 has 8 divisors (see below), whose sum is σ = 27100758640. Its totient is φ = 13543396992.

The previous prime is 20320332223. The next prime is 20320332233. The reversal of 20320332231 is 13223302302.

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

It is not a de Polignac number, because 20320332231 - 2³ = 20320332223 is a prime.

It is a super-2 number, since 2×20320332231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320332198 and 20320332207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320332233) 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, 859180 + ... + 882513.

It is an arithmetic number, because the mean of its divisors is an integer number (3387594830).

Almost surely, 2^20320332231 is an apocalyptic number.

20320332231 is a deficient number, since it is larger than the sum of its proper divisors (6780426409).

20320332231 is a wasteful number, since it uses less digits than its factorization.

20320332231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745585.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20320332231 its reverse (13223302302), we get a palindrome (33543634533).

The spelling of 20320332231 in words is "twenty billion, three hundred twenty million, three hundred thirty-two thousand, two hundred thirty-one".