21046310 has 16 divisors (see below), whose sum is σ = 38341296. Its totient is φ = 8316768.

The previous prime is 21046309. The next prime is 21046327. The reversal of 21046310 is 1364012.

It is a super-2 number, since 2×21046310² = 885894329232200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11849 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (2396331).

Almost surely, 2^21046310 is an apocalyptic number.

21046310 is a deficient number, since it is larger than the sum of its proper divisors (17294986).

21046310 is a wasteful number, since it uses less digits than its factorization.

21046310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25447.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21046310 is about 4587.6257475954. The cubic root of 21046310 is about 276.0950715675.

The spelling of 21046310 in words is "twenty-one million, forty-six thousand, three hundred ten".