21608050 has 12 divisors (see below), whose sum is σ = 40191066. Its totient is φ = 8643200.

The previous prime is 21608039. The next prime is 21608077. The reversal of 21608050 is 5080612.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 20511841 + 1096209 = 4529^2 + 1047^2 .

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, 216031 + ... + 216130.

Almost surely, 2^21608050 is an apocalyptic number.

21608050 is a deficient number, since it is larger than the sum of its proper divisors (18583016).

21608050 is a wasteful number, since it uses less digits than its factorization.

21608050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432173 (or 432168 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 21608050 is about 4648.4459768830. The cubic root of 21608050 is about 278.5299227476.

Adding to 21608050 its reverse (5080612), we get a palindrome (26688662).

The spelling of 21608050 in words is "twenty-one million, six hundred eight thousand, fifty".