20001031313 has 8 divisors (see below), whose sum is σ = 20238797160. Its totient is φ = 19764044800.

The previous prime is 20001031249. The next prime is 20001031319. The reversal of 20001031313 is 31313010002.

It can be written as a sum of positive squares in 4 ways, for example, as 8514121984 + 11486909329 = 92272^2 + 107177^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20001031313 - 2⁶ = 20001031249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001031319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143120 + ... + 245937.

It is an arithmetic number, because the mean of its divisors is an integer number (2529849645).

Almost surely, 2^20001031313 is an apocalyptic number.

It is an amenable number.

20001031313 is a deficient number, since it is larger than the sum of its proper divisors (237765847).

20001031313 is a wasteful number, since it uses less digits than its factorization.

20001031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389667.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 20001031313 its reverse (31313010002), we get a palindrome (51314041315).

The spelling of 20001031313 in words is "twenty billion, one million, thirty-one thousand, three hundred thirteen".