20878926 has 16 divisors (see below), whose sum is σ = 42546384. Its totient is φ = 6828224.

The previous prime is 20878919. The next prime is 20878931. The reversal of 20878926 is 62987802.

It is a happy 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32511 + ... + 33146.

It is an arithmetic number, because the mean of its divisors is an integer number (2659149).

Almost surely, 2^20878926 is an apocalyptic number.

20878926 is an abundant number, since it is smaller than the sum of its proper divisors (21667458).

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

20878926 is a wasteful number, since it uses less digits than its factorization.

20878926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65715.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 20878926 is about 4569.3463427497. The cubic root of 20878926 is about 275.3611827182.

The spelling of 20878926 in words is "twenty million, eight hundred seventy-eight thousand, nine hundred twenty-six".