20131313313 has 16 divisors (see below), whose sum is σ = 27623884160. Its totient is φ = 13031300736.

The previous prime is 20131313309. The next prime is 20131313357. The reversal of 20131313313 is 31331313102.

It is not a de Polignac number, because 20131313313 - 2² = 20131313309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20131313313.

It is not an unprimeable number, because it can be changed into a prime (20131313383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132148 + ... + 240261.

It is an arithmetic number, because the mean of its divisors is an integer number (1726492760).

Almost surely, 2^20131313313 is an apocalyptic number.

It is an amenable number.

20131313313 is a deficient number, since it is larger than the sum of its proper divisors (7492570847).

20131313313 is a wasteful number, since it uses less digits than its factorization.

20131313313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372936.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 20131313313 its reverse (31331313102), we get a palindrome (51462626415).

The spelling of 20131313313 in words is "twenty billion, one hundred thirty-one million, three hundred thirteen thousand, three hundred thirteen".