20386678 has 8 divisors (see below), whose sum is σ = 32932368. Its totient is φ = 9409224.

The previous prime is 20386657. The next prime is 20386679. The reversal of 20386678 is 87668302.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20386678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392026 + ... + 392077.

It is an arithmetic number, because the mean of its divisors is an integer number (4116546).

Almost surely, 2^20386678 is an apocalyptic number.

20386678 is a deficient number, since it is larger than the sum of its proper divisors (12545690).

20386678 is a wasteful number, since it uses less digits than its factorization.

20386678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784118.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20386678 is about 4515.1609052170. The cubic root of 20386678 is about 273.1799499672.

The spelling of 20386678 in words is "twenty million, three hundred eighty-six thousand, six hundred seventy-eight".