20515731630313 has 8 divisors (see below), whose sum is σ = 20801041546880. Its totient is φ = 20231062141680.

The previous prime is 20515731630293. The next prime is 20515731630343. The reversal of 20515731630313 is 31303613751502.

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 20515731630313 - 2⁵ = 20515731630281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20515731630343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160042470 + ... + 160170607.

It is an arithmetic number, because the mean of its divisors is an integer number (2600130193360).

Almost surely, 2^{20515731630313} is an apocalyptic number.

It is an amenable number.

20515731630313 is a deficient number, since it is larger than the sum of its proper divisors (285309916567).

20515731630313 is an equidigital number, since it uses as much as digits as its factorization.

20515731630313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320213967.

The product of its (nonzero) digits is 170100, while the sum is 40.

The spelling of 20515731630313 in words is "twenty trillion, five hundred fifteen billion, seven hundred thirty-one million, six hundred thirty thousand, three hundred thirteen".