20320023130331 has 4 divisors (see below), whose sum is σ = 20320069083072. Its totient is φ = 20319977177592.

The previous prime is 20320023130171. The next prime is 20320023130423. The reversal of 20320023130331 is 13303132002302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320023130331 is a prime.

It is a super-2 number, since 2×20320023130331² (a number of 27 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 = 20320023130297 and 20320023130306.

It is not an unprimeable number, because it can be changed into a prime (20320023130031) 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, 22306571 + ... + 23199636.

It is an arithmetic number, because the mean of its divisors is an integer number (5080017270768).

Almost surely, 2^{20320023130331} is an apocalyptic number.

20320023130331 is a deficient number, since it is larger than the sum of its proper divisors (45952741).

20320023130331 is an equidigital number, since it uses as much as digits as its factorization.

20320023130331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45952740.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20320023130331 its reverse (13303132002302), we get a palindrome (33623155132633).

The spelling of 20320023130331 in words is "twenty trillion, three hundred twenty billion, twenty-three million, one hundred thirty thousand, three hundred thirty-one".