21063276 has 36 divisors (see below), whose sum is σ = 57340192. Its totient is φ = 6480864.

The previous prime is 21063257. The next prime is 21063281. The reversal of 21063276 is 67236012.

It is a happy number.

21063276 is a `hidden beast` number, since 21 + 0 + 632 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22036 + ... + 22971.

Almost surely, 2^21063276 is an apocalyptic number.

21063276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21063276 is an abundant number, since it is smaller than the sum of its proper divisors (36276916).

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

21063276 is a wasteful number, since it uses less digits than its factorization.

21063276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45030 (or 45025 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 21063276 is about 4589.4744797199. The cubic root of 21063276 is about 276.1692408772.

Adding to 21063276 its reverse (67236012), we get a palindrome (88299288).

The spelling of 21063276 in words is "twenty-one million, sixty-three thousand, two hundred seventy-six".