21144050 has 12 divisors (see below), whose sum is σ = 39328026. Its totient is φ = 8457600.

The previous prime is 21144049. The next prime is 21144059. The reversal of 21144050 is 5044112.

It can be written as a sum of positive squares in 3 ways, for example, as 14523721 + 6620329 = 3811^2 + 2573^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211391 + ... + 211490.

Almost surely, 2^21144050 is an apocalyptic number.

21144050 is a deficient number, since it is larger than the sum of its proper divisors (18183976).

21144050 is a wasteful number, since it uses less digits than its factorization.

21144050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422893 (or 422888 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21144050 is about 4598.2659775180. The cubic root of 21144050 is about 276.5218109141.

Adding to 21144050 its reverse (5044112), we get a palindrome (26188162).

The spelling of 21144050 in words is "twenty-one million, one hundred forty-four thousand, fifty".