21037282 has 16 divisors (see below), whose sum is σ = 37228032. Its totient is φ = 8724960.

The previous prime is 21037271. The next prime is 21037283. The reversal of 21037282 is 28273012.

It is not an unprimeable number, because it can be changed into a prime (21037283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23803 + ... + 24670.

It is an arithmetic number, because the mean of its divisors is an integer number (2326752).

Almost surely, 2^21037282 is an apocalyptic number.

21037282 is a deficient number, since it is larger than the sum of its proper divisors (16190750).

21037282 is a wasteful number, since it uses less digits than its factorization.

21037282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48513.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 21037282 is about 4586.6416908235. The cubic root of 21037282 is about 276.0555881173.

The spelling of 21037282 in words is "twenty-one million, thirty-seven thousand, two hundred eighty-two".