20378958 has 8 divisors (see below), whose sum is σ = 40757928. Its totient is φ = 6792984.

The previous prime is 20378957. The next prime is 20378999. The reversal of 20378958 is 85987302.

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

20378958 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378951) 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, 1698241 + ... + 1698252.

It is an arithmetic number, because the mean of its divisors is an integer number (5094741).

Almost surely, 2^20378958 is an apocalyptic number.

20378958 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.

20378958 is a wasteful number, since it uses less digits than its factorization.

20378958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396498.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 20378958 is about 4514.3059267179. The cubic root of 20378958 is about 273.1454631408.

The spelling of 20378958 in words is "twenty million, three hundred seventy-eight thousand, nine hundred fifty-eight".