20878600 has 24 divisors (see below), whose sum is σ = 48543210. Its totient is φ = 8351360.

The previous prime is 20878591. The next prime is 20878603. The reversal of 20878600 is 687802.

It can be written as a sum of positive squares in 3 ways, for example, as 20304036 + 574564 = 4506^2 + 758^2 .

It is not an unprimeable number, because it can be changed into a prime (20878603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51997 + ... + 52396.

Almost surely, 2^20878600 is an apocalyptic number.

20878600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20878600 is an abundant number, since it is smaller than the sum of its proper divisors (27664610).

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

20878600 is a wasteful number, since it uses less digits than its factorization.

20878600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104409 (or 104400 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20878600 is about 4569.3106701121. The cubic root of 20878600 is about 275.3597495632.

The spelling of 20878600 in words is "twenty million, eight hundred seventy-eight thousand, six hundred".