21303110 has 16 divisors (see below), whose sum is σ = 39668400. Its totient is φ = 8227296.

The previous prime is 21303109. The next prime is 21303127. The reversal of 21303110 is 1130312.

It is a junction number, because it is equal to n+sod(n) for n = 21303091 and 21303100.

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, 36440 + ... + 37019.

It is an arithmetic number, because the mean of its divisors is an integer number (2479275).

Almost surely, 2^21303110 is an apocalyptic number.

21303110 is a deficient number, since it is larger than the sum of its proper divisors (18365290).

21303110 is a wasteful number, since it uses less digits than its factorization.

21303110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73495.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 21303110 is about 4615.5292220936. The cubic root of 21303110 is about 277.2134747851.

Adding to 21303110 its reverse (1130312), we get a palindrome (22433422).

The spelling of 21303110 in words is "twenty-one million, three hundred three thousand, one hundred ten".