21104932 has 6 divisors (see below), whose sum is σ = 36933638. Its totient is φ = 10552464.

The previous prime is 21104921. The next prime is 21104947. The reversal of 21104932 is 23940112.

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 8259876 = 3584^2 + 2874^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638113 + ... + 2638120.

Almost surely, 2^21104932 is an apocalyptic number.

It is an amenable number.

21104932 is a deficient number, since it is larger than the sum of its proper divisors (15828706).

21104932 is a wasteful number, since it uses less digits than its factorization.

21104932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276237 (or 5276235 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21104932 is about 4594.0104483991. The cubic root of 21104932 is about 276.3511772876.

The spelling of 21104932 in words is "twenty-one million, one hundred four thousand, nine hundred thirty-two".