20310646360640 has 56 divisors (see below), whose sum is σ = 48792733163640. Its totient is φ = 8052362436608.

The previous prime is 20310646360633. The next prime is 20310646360661. The reversal of 20310646360640 is 4606364601302.

It can be written as a sum of positive squares in 4 ways, for example, as 2731007435776 + 17579638924864 = 1652576^2 + 4192808^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280807955 + ... + 280880274.

Almost surely, 2^{20310646360640} is an apocalyptic number.

20310646360640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310646360640 is an abundant number, since it is smaller than the sum of its proper divisors (28482086803000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20310646360640 is a wasteful number, since it uses less digits than its factorization.

20310646360640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561688359 (or 561688349 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 20310646360640 in words is "twenty trillion, three hundred ten billion, six hundred forty-six million, three hundred sixty thousand, six hundred forty".