20844578125782 has 16 divisors (see below), whose sum is σ = 46321284724080. Its totient is φ = 6948192708576.

The previous prime is 20844578125751. The next prime is 20844578125909. The reversal of 20844578125782 is 28752187544802.

20844578125782 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 4 + 57 + 8 + 1 + 2 + 578 + 2 = 666.

It is a super-2 number, since 2×20844578125782² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193005352963 + ... + 193005353070.

It is an arithmetic number, because the mean of its divisors is an integer number (2895080295255).

Almost surely, 2^{20844578125782} is an apocalyptic number.

20844578125782 is an abundant number, since it is smaller than the sum of its proper divisors (25476706598298).

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

20844578125782 is a wasteful number, since it uses less digits than its factorization.

20844578125782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386010706044 (or 386010706038 counting only the distinct ones).

The product of its (nonzero) digits is 80281600, while the sum is 63.

The spelling of 20844578125782 in words is "twenty trillion, eight hundred forty-four billion, five hundred seventy-eight million, one hundred twenty-five thousand, seven hundred eighty-two".