21276548 has 12 divisors (see below), whose sum is σ = 37289280. Its totient is φ = 10622472.

The previous prime is 21276547. The next prime is 21276551. The reversal of 21276548 is 84567212.

It is not an unprimeable number, because it can be changed into a prime (21276547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (3107440).

Almost surely, 2^21276548 is an apocalyptic number.

It is an amenable number.

21276548 is a deficient number, since it is larger than the sum of its proper divisors (16012732).

21276548 is a wasteful number, since it uses less digits than its factorization.

21276548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7906 (or 7904 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 21276548 is about 4612.6508647414. The cubic root of 21276548 is about 277.0982113832.

The spelling of 21276548 in words is "twenty-one million, two hundred seventy-six thousand, five hundred forty-eight".