21230410 has 24 divisors (see below), whose sum is σ = 40338756. Its totient is φ = 8043840.

The previous prime is 21230401. The next prime is 21230431. The reversal of 21230410 is 1403212.

It can be written as a sum of positive squares in 2 ways, for example, as 20967241 + 263169 = 4579^2 + 513^2 .

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 11 ways as a sum of consecutive naturals, for example, 670 + ... + 6550.

Almost surely, 2^21230410 is an apocalyptic number.

21230410 is a deficient number, since it is larger than the sum of its proper divisors (19108346).

21230410 is a wasteful number, since it uses less digits than its factorization.

21230410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21230410 is about 4607.6469048745. The cubic root of 21230410 is about 276.8977714491.

Adding to 21230410 its reverse (1403212), we get a palindrome (22633622).

The spelling of 21230410 in words is "twenty-one million, two hundred thirty thousand, four hundred ten".