20706878 has 8 divisors (see below), whose sum is σ = 31150872. Its totient is φ = 10323256.

The previous prime is 20706871. The next prime is 20706929. The reversal of 20706878 is 87860702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14225 + ... + 15612.

It is an arithmetic number, because the mean of its divisors is an integer number (3893859).

Almost surely, 2^20706878 is an apocalyptic number.

20706878 is a deficient number, since it is larger than the sum of its proper divisors (10443994).

20706878 is a wasteful number, since it uses less digits than its factorization.

20706878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30186.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 20706878 is about 4550.4810734690. The cubic root of 20706878 is about 274.6027454257.

The spelling of 20706878 in words is "twenty million, seven hundred six thousand, eight hundred seventy-eight".