31020320013023 has 8 divisors (see below), whose sum is σ = 34754953135440. Its totient is φ = 27438120895680.

The previous prime is 31020320012977. The next prime is 31020320013061. The reversal of 31020320013023 is 32031002302013.

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

It is not a de Polignac number, because 31020320013023 - 2³² = 31016025045727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020320012986 and 31020320013004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020320013223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38108500838 + ... + 38108501651.

It is an arithmetic number, because the mean of its divisors is an integer number (4344369141930).

Almost surely, 2^{31020320013023} is an apocalyptic number.

31020320013023 is a deficient number, since it is larger than the sum of its proper divisors (3734633122417).

31020320013023 is a wasteful number, since it uses less digits than its factorization.

31020320013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76217002537.

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

Adding to 31020320013023 its reverse (32031002302013), we get a palindrome (63051322315036).

The spelling of 31020320013023 in words is "thirty-one trillion, twenty billion, three hundred twenty million, thirteen thousand, twenty-three".