20778273201843 has 6 divisors (see below), whose sum is σ = 30013061291564. Its totient is φ = 13852182134556.

The previous prime is 20778273201811. The next prime is 20778273201989. The reversal of 20778273201843 is 34810237287702.

20778273201843 is a `hidden beast` number, since 20 + 7 + 78 + 273 + 201 + 84 + 3 = 666.

It is not a de Polignac number, because 20778273201843 - 2⁵ = 20778273201811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20778273201843.

It is not an unprimeable number, because it can be changed into a prime (20778273203843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1154348511205 + ... + 1154348511222.

Almost surely, 2^{20778273201843} is an apocalyptic number.

20778273201843 is a deficient number, since it is larger than the sum of its proper divisors (9234788089721).

20778273201843 is a wasteful number, since it uses less digits than its factorization.

20778273201843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308697022433 (or 2308697022430 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 20778273201843 in words is "twenty trillion, seven hundred seventy-eight billion, two hundred seventy-three million, two hundred one thousand, eight hundred forty-three".