20782305373355 has 4 divisors (see below), whose sum is σ = 24938766448032. Its totient is φ = 16625844298680.

The previous prime is 20782305373327. The next prime is 20782305373367. The reversal of 20782305373355 is 55337350328702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20782305373355 - 2¹⁰ = 20782305372331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20782305373297 and 20782305373306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078230537331 + ... + 2078230537340.

It is an arithmetic number, because the mean of its divisors is an integer number (6234691612008).

Almost surely, 2^{20782305373355} is an apocalyptic number.

20782305373355 is a deficient number, since it is larger than the sum of its proper divisors (4156461074677).

20782305373355 is an equidigital number, since it uses as much as digits as its factorization.

20782305373355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156461074676.

The product of its (nonzero) digits is 15876000, while the sum is 53.

The spelling of 20782305373355 in words is "twenty trillion, seven hundred eighty-two billion, three hundred five million, three hundred seventy-three thousand, three hundred fifty-five".