20878774 has 16 divisors (see below), whose sum is σ = 36036000. Its totient is φ = 8887104.

The previous prime is 20878769. The next prime is 20878787. The reversal of 20878774 is 47787802.

It is a self number, because there is not a number n which added to its sum of digits gives 20878774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919 + ... + 7090.

It is an arithmetic number, because the mean of its divisors is an integer number (2252250).

Almost surely, 2^20878774 is an apocalyptic number.

20878774 is a deficient number, since it is larger than the sum of its proper divisors (15157226).

20878774 is a wasteful number, since it uses less digits than its factorization.

20878774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 20878774 is about 4569.3297101435. The cubic root of 20878774 is about 275.3605145005.

The spelling of 20878774 in words is "twenty million, eight hundred seventy-eight thousand, seven hundred seventy-four".