20874838 has 8 divisors (see below), whose sum is σ = 32392080. Its totient is φ = 10077480.

The previous prime is 20874817. The next prime is 20874839. The reversal of 20874838 is 83847802.

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 20874838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179898 + ... + 180013.

It is an arithmetic number, because the mean of its divisors is an integer number (4049010).

Almost surely, 2^20874838 is an apocalyptic number.

20874838 is a deficient number, since it is larger than the sum of its proper divisors (11517242).

20874838 is a wasteful number, since it uses less digits than its factorization.

20874838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359942.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 20874838 is about 4568.8989920986. The cubic root of 20874838 is about 275.3432100506.

It can be divided in two parts, 20874 and 838, that added together give a palindrome (21712).

The spelling of 20874838 in words is "twenty million, eight hundred seventy-four thousand, eight hundred thirty-eight".