20378838 has 8 divisors (see below), whose sum is σ = 40757688. Its totient is φ = 6792944.

The previous prime is 20378837. The next prime is 20378863. The reversal of 20378838 is 83887302.

It is a happy number.

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

20378838 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20378796 and 20378805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378837) 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, 1698231 + ... + 1698242.

It is an arithmetic number, because the mean of its divisors is an integer number (5094711).

Almost surely, 2^20378838 is an apocalyptic number.

20378838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20378838 is a wasteful number, since it uses less digits than its factorization.

20378838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396478.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 20378838 is about 4514.2926356186. The cubic root of 20378838 is about 273.1449270074.

The spelling of 20378838 in words is "twenty million, three hundred seventy-eight thousand, eight hundred thirty-eight".