21063274 has 16 divisors (see below), whose sum is σ = 32407560. Its totient is φ = 10264320.

The previous prime is 21063257. The next prime is 21063281. The reversal of 21063274 is 47236012.

It can be written as a sum of positive squares in 4 ways, for example, as 18122049 + 2941225 = 4257^2 + 1715^2 .

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 7 ways as a sum of consecutive naturals, for example, 12184 + ... + 13804.

Almost surely, 2^21063274 is an apocalyptic number.

21063274 is a deficient number, since it is larger than the sum of its proper divisors (11344286).

21063274 is a wasteful number, since it uses less digits than its factorization.

21063274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21063274 is about 4589.4742618300. The cubic root of 21063274 is about 276.1692321363.

Adding to 21063274 its reverse (47236012), we get a palindrome (68299286).

The spelling of 21063274 in words is "twenty-one million, sixty-three thousand, two hundred seventy-four".