20784085106091 has 16 divisors (see below), whose sum is σ = 28617266608128. Its totient is φ = 13403830608000.

The previous prime is 20784085106069. The next prime is 20784085106093. The reversal of 20784085106091 is 19060158048702.

It is not a de Polignac number, because 20784085106091 - 2⁷ = 20784085105963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20784085106093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43566126 + ... + 44040611.

It is an arithmetic number, because the mean of its divisors is an integer number (1788579163008).

Almost surely, 2^{20784085106091} is an apocalyptic number.

20784085106091 is a deficient number, since it is larger than the sum of its proper divisors (7833181502037).

20784085106091 is a wasteful number, since it uses less digits than its factorization.

20784085106091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87609322.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 20784085106091 in words is "twenty trillion, seven hundred eighty-four billion, eighty-five million, one hundred six thousand, ninety-one".