21276160 has 40 divisors (see below), whose sum is σ = 51019056. Its totient is φ = 8509440.

The previous prime is 21276149. The next prime is 21276179. The reversal of 21276160 is 6167212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596 + ... + 6715.

Almost surely, 2^21276160 is an apocalyptic number.

21276160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21276160 is an abundant number, since it is smaller than the sum of its proper divisors (29742896).

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

21276160 is an frugal number, since it uses more digits than its factorization.

21276160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334 (or 8318 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 21276160 is about 4612.6088063047. The cubic root of 21276160 is about 277.0965269815.

The spelling of 21276160 in words is "twenty-one million, two hundred seventy-six thousand, one hundred sixty".