20668448460260 has 12 divisors (see below), whose sum is σ = 43403741766588. Its totient is φ = 8267379384096.

The previous prime is 20668448460241. The next prime is 20668448460263. The reversal of 20668448460260 is 6206484486602.

It can be written as a sum of positive squares in 2 ways, for example, as 5027182811044 + 15641265649216 = 2242138^2 + 3954904^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20668448460196 and 20668448460205.

It is not an unprimeable number, because it can be changed into a prime (20668448460263) 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, 516711211487 + ... + 516711211526.

It is an arithmetic number, because the mean of its divisors is an integer number (3616978480549).

Almost surely, 2^{20668448460260} is an apocalyptic number.

20668448460260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20668448460260 is an abundant number, since it is smaller than the sum of its proper divisors (22735293306328).

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

20668448460260 is a wasteful number, since it uses less digits than its factorization.

20668448460260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033422423022 (or 1033422423020 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 56.

The spelling of 20668448460260 in words is "twenty trillion, six hundred sixty-eight billion, four hundred forty-eight million, four hundred sixty thousand, two hundred sixty".