21033088 has 16 divisors (see below), whose sum is σ = 41902110. Its totient is φ = 10516480.

The previous prime is 21033083. The next prime is 21033119. The reversal of 21033088 is 88033012.

It can be written as a sum of positive squares in only one way, i.e., 20866624 + 166464 = 4568^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-3 number, since 3×21033088³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21033083) 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 as a sum of consecutive naturals, namely, 82033 + ... + 82288.

Almost surely, 2^21033088 is an apocalyptic number.

It is an amenable number.

21033088 is a deficient number, since it is larger than the sum of its proper divisors (20869022).

21033088 is an equidigital number, since it uses as much as digits as its factorization.

21033088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164335 (or 164323 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21033088 is about 4586.1844707774. The cubic root of 21033088 is about 276.0372420515.

The spelling of 21033088 in words is "twenty-one million, thirty-three thousand, eighty-eight".