20633667549966 has 128 divisors (see below), whose sum is σ = 48994883942400. Its totient is φ = 6414221399040.

The previous prime is 20633667549947. The next prime is 20633667549973. The reversal of 20633667549966 is 66994576633602.

20633667549966 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 3 + 6 + 6 + 75 + 499 + 66 = 666.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20633667549894 and 20633667549903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45951051 + ... + 46397913.

It is an arithmetic number, because the mean of its divisors is an integer number (382772530800).

Almost surely, 2^{20633667549966} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20633667549966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24497441971200).

20633667549966 is an abundant number, since it is smaller than the sum of its proper divisors (28361216392434).

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

20633667549966 is a wasteful number, since it uses less digits than its factorization.

20633667549966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447351 (or 447345 counting only the distinct ones).

The product of its (nonzero) digits is 1587237120, while the sum is 72.

The spelling of 20633667549966 in words is "twenty trillion, six hundred thirty-three billion, six hundred sixty-seven million, five hundred forty-nine thousand, nine hundred sixty-six".