20313131323309 has 32 divisors (see below), whose sum is σ = 23847041203200. Its totient is φ = 17107656762240.

The previous prime is 20313131323307. The next prime is 20313131323313. The reversal of 20313131323309 is 90332313131302.

It is not a de Polignac number, because 20313131323309 - 2¹ = 20313131323307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313131323307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3375849 + ... + 7212670.

It is an arithmetic number, because the mean of its divisors is an integer number (745220037600).

Almost surely, 2^{20313131323309} is an apocalyptic number.

It is an amenable number.

20313131323309 is a deficient number, since it is larger than the sum of its proper divisors (3533909879891).

20313131323309 is a wasteful number, since it uses less digits than its factorization.

20313131323309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10588753.

The product of its (nonzero) digits is 26244, while the sum is 34.

The spelling of 20313131323309 in words is "twenty trillion, three hundred thirteen billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred nine".