20878596 has 18 divisors (see below), whose sum is σ = 52776542. Its totient is φ = 6959520.

The previous prime is 20878591. The next prime is 20878603. The reversal of 20878596 is 69587802.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 7918596 = 3600^2 + 2814^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20878591) 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, 289945 + ... + 290016.

Almost surely, 2^20878596 is an apocalyptic number.

It is an amenable number.

20878596 is an abundant number, since it is smaller than the sum of its proper divisors (31897946).

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

20878596 is a wasteful number, since it uses less digits than its factorization.

20878596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579971 (or 579966 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20878596 is about 4569.3102324093. The cubic root of 20878596 is about 275.3597319784.

The spelling of 20878596 in words is "twenty million, eight hundred seventy-eight thousand, five hundred ninety-six".