21046316 has 12 divisors (see below), whose sum is σ = 36905400. Its totient is φ = 10501920.

The previous prime is 21046309. The next prime is 21046327. The reversal of 21046316 is 61364012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21046291 and 21046300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (3075450).

Almost surely, 2^21046316 is an apocalyptic number.

It is an amenable number.

21046316 is a deficient number, since it is larger than the sum of its proper divisors (15859084).

21046316 is a wasteful number, since it uses less digits than its factorization.

21046316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10624 (or 10622 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21046316 is about 4587.6264015284. The cubic root of 21046316 is about 276.0950978044.

The spelling of 21046316 in words is "twenty-one million, forty-six thousand, three hundred sixteen".