21150532 has 24 divisors (see below), whose sum is σ = 40941656. Its totient is φ = 9497088.

The previous prime is 21150523. The next prime is 21150607. The reversal of 21150532 is 23505112.

It can be written as a sum of positive squares in 4 ways, for example, as 1223236 + 19927296 = 1106^2 + 4464^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3573 + ... + 7420.

Almost surely, 2^21150532 is an apocalyptic number.

It is an amenable number.

21150532 is a deficient number, since it is larger than the sum of its proper divisors (19791124).

21150532 is a wasteful number, since it uses less digits than its factorization.

21150532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047 (or 11045 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 21150532 is about 4598.9707544189. The cubic root of 21150532 is about 276.5500652181.

Adding to 21150532 its reverse (23505112), we get a palindrome (44655644).

The spelling of 21150532 in words is "twenty-one million, one hundred fifty thousand, five hundred thirty-two".