20385878 has 8 divisors (see below), whose sum is σ = 30849768. Its totient is φ = 10102624.

The previous prime is 20385851. The next prime is 20385887. The reversal of 20385878 is 87858302.

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

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, 44876 + ... + 45327.

It is an arithmetic number, because the mean of its divisors is an integer number (3856221).

Almost surely, 2^20385878 is an apocalyptic number.

20385878 is a deficient number, since it is larger than the sum of its proper divisors (10463890).

20385878 is a wasteful number, since it uses less digits than its factorization.

20385878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90318.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 20385878 is about 4515.0723139281. The cubic root of 20385878 is about 273.1763766072.

The spelling of 20385878 in words is "twenty million, three hundred eighty-five thousand, eight hundred seventy-eight".