20878960 has 20 divisors (see below), whose sum is σ = 48543768. Its totient is φ = 8351552.

The previous prime is 20878939. The next prime is 20878961. The reversal of 20878960 is 6987802.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878961) 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, 130414 + ... + 130573.

Almost surely, 2^20878960 is an apocalyptic number.

20878960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20878960 is an abundant number, since it is smaller than the sum of its proper divisors (27664808).

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

20878960 is a wasteful number, since it uses less digits than its factorization.

20878960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261000 (or 260994 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20878960 is about 4569.3500631928. The cubic root of 20878960 is about 275.3613321875.

It can be divided in two parts, 208789 and 60, that added together give a square (208849 = 457²).

The spelling of 20878960 in words is "twenty million, eight hundred seventy-eight thousand, nine hundred sixty".