21033050 has 24 divisors (see below), whose sum is σ = 39864636. Its totient is φ = 8253440.

The previous prime is 21033011. The next prime is 21033053. The reversal of 21033050 is 5033012.

It can be written as a sum of positive squares in 6 ways, for example, as 16801801 + 4231249 = 4099^2 + 2057^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (21033053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1319 + ... + 6618.

Almost surely, 2^21033050 is an apocalyptic number.

21033050 is a deficient number, since it is larger than the sum of its proper divisors (18831586).

21033050 is a wasteful number, since it uses less digits than its factorization.

21033050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002 (or 7997 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 21033050 is about 4586.1803278982. The cubic root of 21033050 is about 276.0370758146.

Adding to 21033050 its reverse (5033012), we get a palindrome (26066062).

The spelling of 21033050 in words is "twenty-one million, thirty-three thousand, fifty".