20666149844160 has 112 divisors (see below), whose sum is σ = 65626914329856. Its totient is φ = 5509974776832.

The previous prime is 20666149844149. The next prime is 20666149844177. The reversal of 20666149844160 is 6144894166602.

It is a super-2 number, since 2×20666149844160² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20666149844160.

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, 3358459 + ... + 7253381.

Almost surely, 2^{20666149844160} is an apocalyptic number.

20666149844160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20666149844160 is an abundant number, since it is smaller than the sum of its proper divisors (44960764485696).

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

20666149844160 is a wasteful number, since it uses less digits than its factorization.

20666149844160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900470 (or 3900460 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 20666149844160 in words is "twenty trillion, six hundred sixty-six billion, one hundred forty-nine million, eight hundred forty-four thousand, one hundred sixty".