21323110 has 8 divisors (see below), whose sum is σ = 38381616. Its totient is φ = 8529240.

The previous prime is 21323089. The next prime is 21323129. The reversal of 21323110 is 1132312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066146 + ... + 1066165.

It is an arithmetic number, because the mean of its divisors is an integer number (4797702).

Almost surely, 2^21323110 is an apocalyptic number.

21323110 is a deficient number, since it is larger than the sum of its proper divisors (17058506).

21323110 is a wasteful number, since it uses less digits than its factorization.

21323110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132318.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21323110 is about 4617.6953125991. The cubic root of 21323110 is about 277.3001997650.

Adding to 21323110 its reverse (1132312), we get a palindrome (22455422).

The spelling of 21323110 in words is "twenty-one million, three hundred twenty-three thousand, one hundred ten".