20116178 has 4 divisors (see below), whose sum is σ = 30174270. Its totient is φ = 10058088.

The previous prime is 20116177. The next prime is 20116211. The reversal of 20116178 is 87161102.

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

It can be written as a sum of positive squares in only one way, i.e., 16104169 + 4012009 = 4013^2 + 2003^2 .

It is not an unprimeable number, because it can be changed into a prime (20116177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5029043 + ... + 5029046.

Almost surely, 2^20116178 is an apocalyptic number.

20116178 is a deficient number, since it is larger than the sum of its proper divisors (10058092).

20116178 is a wasteful number, since it uses less digits than its factorization.

20116178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10058091.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 20116178 is about 4485.1062417740. The cubic root of 20116178 is about 271.9663399091.

The spelling of 20116178 in words is "twenty million, one hundred sixteen thousand, one hundred seventy-eight".