20284516678178 has 8 divisors (see below), whose sum is σ = 30925574607900. Its totient is φ = 9975991808880.

The previous prime is 20284516678141. The next prime is 20284516678229. The reversal of 20284516678178 is 87187661548202.

It can be written as a sum of positive squares in 2 ways, for example, as 20284511691889 + 4986289 = 4503833^2 + 2233^2 .

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

It is a super-2 number, since 2×20284516678178² (a number of 27 digits) contains 22 as substring.

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, 83133264953 + ... + 83133265196.

Almost surely, 2^{20284516678178} is an apocalyptic number.

20284516678178 is a deficient number, since it is larger than the sum of its proper divisors (10641057929722).

20284516678178 is a wasteful number, since it uses less digits than its factorization.

20284516678178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166266530212.

The product of its (nonzero) digits is 72253440, while the sum is 65.

The spelling of 20284516678178 in words is "twenty trillion, two hundred eighty-four billion, five hundred sixteen million, six hundred seventy-eight thousand, one hundred seventy-eight".