20315456651163 has 4 divisors (see below), whose sum is σ = 27087275534888. Its totient is φ = 13543637767440.

The previous prime is 20315456651131. The next prime is 20315456651167. The reversal of 20315456651163 is 36115665451302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20315456651163 - 2⁵ = 20315456651131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315456651167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385909441858 + ... + 3385909441863.

It is an arithmetic number, because the mean of its divisors is an integer number (6771818883722).

Almost surely, 2^{20315456651163} is an apocalyptic number.

20315456651163 is a deficient number, since it is larger than the sum of its proper divisors (6771818883725).

20315456651163 is an equidigital number, since it uses as much as digits as its factorization.

20315456651163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771818883724.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 20315456651163 in words is "twenty trillion, three hundred fifteen billion, four hundred fifty-six million, six hundred fifty-one thousand, one hundred sixty-three".