20678168 has 16 divisors (see below), whose sum is σ = 44310480. Its totient is φ = 8862048.

The previous prime is 20678159. The next prime is 20678179. The reversal of 20678168 is 86187602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184571 + ... + 184682.

It is an arithmetic number, because the mean of its divisors is an integer number (2769405).

Almost surely, 2^20678168 is an apocalyptic number.

20678168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20678168 is an abundant number, since it is smaller than the sum of its proper divisors (23632312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20678168 is a wasteful number, since it uses less digits than its factorization.

20678168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369266 (or 369262 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20678168 is about 4547.3253677299. The cubic root of 20678168 is about 274.4757748724.

The spelling of 20678168 in words is "twenty million, six hundred seventy-eight thousand, one hundred sixty-eight".