21152050 has 24 divisors (see below), whose sum is σ = 39474036. Its totient is φ = 8432640.

The previous prime is 21152039. The next prime is 21152051. The reversal of 21152050 is 5025112.

It can be written as a sum of positive squares in 6 ways, for example, as 8485569 + 12666481 = 2913^2 + 3559^2 .

It is not an unprimeable number, because it can be changed into a prime (21152051) 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, 21162 + ... + 22138.

Almost surely, 2^21152050 is an apocalyptic number.

21152050 is a deficient number, since it is larger than the sum of its proper divisors (18321986).

21152050 is a wasteful number, since it uses less digits than its factorization.

21152050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 21152050 is about 4599.1357883846. The cubic root of 21152050 is about 276.5566811739.

Adding to 21152050 its reverse (5025112), we get a palindrome (26177162).

The spelling of 21152050 in words is "twenty-one million, one hundred fifty-two thousand, fifty".