21235050 has 36 divisors (see below), whose sum is σ = 57052710. Its totient is φ = 5662560.

The previous prime is 21235037. The next prime is 21235051. The reversal of 21235050 is 5053212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 20493729 + 741321 = 4527^2 + 861^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21235051) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23145 + ... + 24044.

Almost surely, 2^21235050 is an apocalyptic number.

21235050 is an abundant number, since it is smaller than the sum of its proper divisors (35817660).

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

21235050 is a wasteful number, since it uses less digits than its factorization.

21235050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47207 (or 47199 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 21235050 is about 4608.1503881709. The cubic root of 21235050 is about 276.9179423906.

Adding to 21235050 its reverse (5053212), we get a palindrome (26288262).

The spelling of 21235050 in words is "twenty-one million, two hundred thirty-five thousand, fifty".