21026332 has 6 divisors (see below), whose sum is σ = 36796088. Its totient is φ = 10513164.

The previous prime is 21026303. The next prime is 21026333. The reversal of 21026332 is 23362012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628288 + ... + 2628295.

Almost surely, 2^21026332 is an apocalyptic number.

It is an amenable number.

21026332 is a deficient number, since it is larger than the sum of its proper divisors (15769756).

21026332 is a wasteful number, since it uses less digits than its factorization.

21026332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256587 (or 5256585 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 21026332 is about 4585.4478516280. The cubic root of 21026332 is about 276.0076837460.

Adding to 21026332 its reverse (23362012), we get a palindrome (44388344).

The spelling of 21026332 in words is "twenty-one million, twenty-six thousand, three hundred thirty-two".