20855607281411 has 4 divisors (see below), whose sum is σ = 23834979750192. Its totient is φ = 17876234812632.

The previous prime is 20855607281393. The next prime is 20855607281459. The reversal of 20855607281411 is 11418270655802.

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

It is not a de Polignac number, because 20855607281411 - 2¹⁸ = 20855607019267 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 20855607281411.

It is not an unprimeable number, because it can be changed into a prime (20855607281111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489686234380 + ... + 1489686234393.

It is an arithmetic number, because the mean of its divisors is an integer number (5958744937548).

Almost surely, 2^{20855607281411} is an apocalyptic number.

20855607281411 is a deficient number, since it is larger than the sum of its proper divisors (2979372468781).

20855607281411 is an equidigital number, since it uses as much as digits as its factorization.

20855607281411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979372468780.

The product of its (nonzero) digits is 1075200, while the sum is 50.

The spelling of 20855607281411 in words is "twenty trillion, eight hundred fifty-five billion, six hundred seven million, two hundred eighty-one thousand, four hundred eleven".