21064310 has 8 divisors (see below), whose sum is σ = 37915776. Its totient is φ = 8425720.

The previous prime is 21064301. The next prime is 21064313. The reversal of 21064310 is 1346012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21064310² = 887410311552200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21064313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053206 + ... + 1053225.

It is an arithmetic number, because the mean of its divisors is an integer number (4739472).

Almost surely, 2^21064310 is an apocalyptic number.

21064310 is a deficient number, since it is larger than the sum of its proper divisors (16851466).

21064310 is a wasteful number, since it uses less digits than its factorization.

21064310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106438.

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

The square root of 21064310 is about 4589.5871274005. The cubic root of 21064310 is about 276.1737598691.

The spelling of 21064310 in words is "twenty-one million, sixty-four thousand, three hundred ten".