20782305374087 has 2 divisors, whose sum is σ = 20782305374088. Its totient is φ = 20782305374086.

The previous prime is 20782305374023. The next prime is 20782305374101. The reversal of 20782305374087 is 78047350328702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20782305374087 - 2⁶ = 20782305374023 is a prime.

It is a super-3 number, since 3×20782305374087³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20782305374387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10391152687043 + 10391152687044.

It is an arithmetic number, because the mean of its divisors is an integer number (10391152687044).

Almost surely, 2^{20782305374087} is an apocalyptic number.

20782305374087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20782305374087 is an equidigital number, since it uses as much as digits as its factorization.

20782305374087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 20782305374087 in words is "twenty trillion, seven hundred eighty-two billion, three hundred five million, three hundred seventy-four thousand, eighty-seven".