21019132 has 12 divisors (see below), whose sum is σ = 37031400. Its totient is φ = 10438736.

The previous prime is 21019129. The next prime is 21019151. The reversal of 21019132 is 23191012.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 17038 + ... + 18229.

It is an arithmetic number, because the mean of its divisors is an integer number (3085950).

Almost surely, 2^21019132 is an apocalyptic number.

It is an amenable number.

21019132 is a deficient number, since it is larger than the sum of its proper divisors (16012268).

21019132 is a wasteful number, since it uses less digits than its factorization.

21019132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35420 (or 35418 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 21019132 is about 4584.6626920636. The cubic root of 21019132 is about 275.9761759174.

The spelling of 21019132 in words is "twenty-one million, nineteen thousand, one hundred thirty-two".