21033200 has 30 divisors (see below), whose sum is σ = 50533224. Its totient is φ = 8413120.

The previous prime is 21033193. The next prime is 21033203. The reversal of 21033200 is 233012.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25892 + ... + 26691.

Almost surely, 2^21033200 is an apocalyptic number.

21033200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033200 is an abundant number, since it is smaller than the sum of its proper divisors (29500024).

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

21033200 is a wasteful number, since it uses less digits than its factorization.

21033200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52601 (or 52590 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 21033200 is about 4586.1966813472. The cubic root of 21033200 is about 276.0377320115.

Adding to 21033200 its reverse (233012), we get a palindrome (21266212).

The spelling of 21033200 in words is "twenty-one million, thirty-three thousand, two hundred".