20902687066880 has 36 divisors (see below), whose sum is σ = 50068467617952. Its totient is φ = 8361074826240.

The previous prime is 20902687066799. The next prime is 20902687066883. The reversal of 20902687066880 is 8866078620902.

It is not an unprimeable number, because it can be changed into a prime (20902687066883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8165110856 + ... + 8165113415.

Almost surely, 2^{20902687066880} is an apocalyptic number.

20902687066880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20902687066880 is an abundant number, since it is smaller than the sum of its proper divisors (29165780551072).

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

20902687066880 is an equidigital number, since it uses as much as digits as its factorization.

20902687066880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16330224292 (or 16330224278 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 20902687066880 in words is "twenty trillion, nine hundred two billion, six hundred eighty-seven million, sixty-six thousand, eight hundred eighty".