20903320816128 has 200 divisors, whose sum is σ = 64403522494080. Its totient is φ = 6743006300160.

The previous prime is 20903320816069. The next prime is 20903320816171. The reversal of 20903320816128 is 82161802330902.

20903320816128 is a `hidden beast` number, since 2 + 0 + 9 + 0 + 3 + 3 + 20 + 8 + 1 + 612 + 8 = 666.

It is a super-2 number, since 2×20903320816128² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6843958 + ... + 9415221.

Almost surely, 2^{20903320816128} is an apocalyptic number.

It is an amenable number.

20903320816128 is an abundant number, since it is smaller than the sum of its proper divisors (43500201677952).

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

20903320816128 is an equidigital number, since it uses as much as digits as its factorization.

20903320816128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16259240 (or 16259215 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 20903320816128 in words is "twenty trillion, nine hundred three billion, three hundred twenty million, eight hundred sixteen thousand, one hundred twenty-eight".