21308110 has 16 divisors (see below), whose sum is σ = 39290832. Its totient is φ = 8315200.

The previous prime is 21308107. The next prime is 21308137. The reversal of 21308110 is 1180312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25576 + ... + 26395.

It is an arithmetic number, because the mean of its divisors is an integer number (2455677).

Almost surely, 2^21308110 is an apocalyptic number.

21308110 is a deficient number, since it is larger than the sum of its proper divisors (17982722).

21308110 is a wasteful number, since it uses less digits than its factorization.

21308110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52019.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21308110 is about 4616.0708400110. The cubic root of 21308110 is about 277.2351611171.

Adding to 21308110 its reverse (1180312), we get a palindrome (22488422).

The spelling of 21308110 in words is "twenty-one million, three hundred eight thousand, one hundred ten".