21275676 has 48 divisors (see below), whose sum is σ = 57069600. Its totient is φ = 6846336.

The previous prime is 21275671. The next prime is 21275677. The reversal of 21275676 is 67657212.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21275676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21275671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1188950).

Almost surely, 2^21275676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21275676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28534800).

21275676 is an abundant number, since it is smaller than the sum of its proper divisors (35793924).

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

21275676 is a wasteful number, since it uses less digits than its factorization.

21275676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6835 (or 6827 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 21275676 is about 4612.5563411193. The cubic root of 21275676 is about 277.0944257919.

The spelling of 21275676 in words is "twenty-one million, two hundred seventy-five thousand, six hundred seventy-six".