21230050 has 12 divisors (see below), whose sum is σ = 39487986. Its totient is φ = 8492000.

The previous prime is 21230047. The next prime is 21230123. The reversal of 21230050 is 5003212.

It can be written as a sum of positive squares in 3 ways, for example, as 8334769 + 12895281 = 2887^2 + 3591^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21230050.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212251 + ... + 212350.

Almost surely, 2^21230050 is an apocalyptic number.

21230050 is a deficient number, since it is larger than the sum of its proper divisors (18257936).

21230050 is a wasteful number, since it uses less digits than its factorization.

21230050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424613 (or 424608 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 21230050 is about 4607.6078392155. The cubic root of 21230050 is about 276.8962063394.

Adding to 21230050 its reverse (5003212), we get a palindrome (26233262).

The spelling of 21230050 in words is "twenty-one million, two hundred thirty thousand, fifty".