20808808606460 has 48 divisors (see below), whose sum is σ = 49943509156800. Its totient is φ = 7134110307840.

The previous prime is 20808808606447. The next prime is 20808808606501. The reversal of 20808808606460 is 6460680880802.

It is a junction number, because it is equal to n+sod(n) for n = 20808808606396 and 20808808606405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553121 + ... + 6474840.

It is an arithmetic number, because the mean of its divisors is an integer number (1040489774100).

Almost surely, 2^{20808808606460} is an apocalyptic number.

20808808606460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20808808606460 is an abundant number, since it is smaller than the sum of its proper divisors (29134700550340).

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

20808808606460 is a wasteful number, since it uses less digits than its factorization.

20808808606460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049126 (or 7049124 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 56.

The spelling of 20808808606460 in words is "twenty trillion, eight hundred eight billion, eight hundred eight million, six hundred six thousand, four hundred sixty".