20284516678177 has 8 divisors (see below), whose sum is σ = 20493732863016. Its totient is φ = 20075302482432.

The previous prime is 20284516678141. The next prime is 20284516678229. The reversal of 20284516678177 is 77187661548202.

It can be written as a sum of positive squares in 4 ways, for example, as 2428956537121 + 17855560141056 = 1558511^2 + 4225584^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20284516678177 - 2³⁵ = 20250156939809 is a prime.

It is a super-2 number, since 2×20284516678177² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20284516673177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28947483 + ... + 29639935.

It is an arithmetic number, because the mean of its divisors is an integer number (2561716607877).

Almost surely, 2^{20284516678177} is an apocalyptic number.

It is an amenable number.

20284516678177 is a deficient number, since it is larger than the sum of its proper divisors (209216184839).

20284516678177 is an equidigital number, since it uses as much as digits as its factorization.

20284516678177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994547.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 20284516678177 in words is "twenty trillion, two hundred eighty-four billion, five hundred sixteen million, six hundred seventy-eight thousand, one hundred seventy-seven".