21065276 has 6 divisors (see below), whose sum is σ = 36864240. Its totient is φ = 10532636.

The previous prime is 21065273. The next prime is 21065287. The reversal of 21065276 is 67256012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21065273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2633156 + ... + 2633163.

It is an arithmetic number, because the mean of its divisors is an integer number (6144040).

Almost surely, 2^21065276 is an apocalyptic number.

It is an amenable number.

21065276 is a deficient number, since it is larger than the sum of its proper divisors (15798964).

21065276 is a wasteful number, since it uses less digits than its factorization.

21065276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266323 (or 5266321 counting only the distinct ones).

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

The square root of 21065276 is about 4589.6923644183. The cubic root of 21065276 is about 276.1779815403.

The spelling of 21065276 in words is "twenty-one million, sixty-five thousand, two hundred seventy-six".