21093310 has 16 divisors (see below), whose sum is σ = 43392096. Its totient is φ = 7231968.

The previous prime is 21093301. The next prime is 21093313. The reversal of 21093310 is 1339012.

It is a super-2 number, since 2×21093310² = 889855453512200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21093313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150597 + ... + 150736.

It is an arithmetic number, because the mean of its divisors is an integer number (2712006).

Almost surely, 2^21093310 is an apocalyptic number.

21093310 is an abundant number, since it is smaller than the sum of its proper divisors (22298786).

21093310 is a wasteful number, since it uses less digits than its factorization.

21093310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301347.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 21093310 is about 4592.7453663359. The cubic root of 21093310 is about 276.3004412305.

The spelling of 21093310 in words is "twenty-one million, ninety-three thousand, three hundred ten".