21267056 has 40 divisors (see below), whose sum is σ = 42434784. Its totient is φ = 10321920.

The previous prime is 21267053. The next prime is 21267067. The reversal of 21267056 is 65076212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21267053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110096 + ... + 110288.

Almost surely, 2^21267056 is an apocalyptic number.

It is an amenable number.

21267056 is a deficient number, since it is larger than the sum of its proper divisors (21167728).

21267056 is a wasteful number, since it uses less digits than its factorization.

21267056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 21267056 is about 4611.6218405242. The cubic root of 21267056 is about 277.0569984406.

The spelling of 21267056 in words is "twenty-one million, two hundred sixty-seven thousand, fifty-six".