21310010 has 16 divisors (see below), whose sum is σ = 40614696. Its totient is φ = 8022528.

The previous prime is 21310007. The next prime is 21310021. The reversal of 21310010 is 1001312.

It can be written as a sum of positive squares in 4 ways, for example, as 19704721 + 1605289 = 4439^2 + 1267^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21310010.

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, 62507 + ... + 62846.

Almost surely, 2^21310010 is an apocalyptic number.

21310010 is a deficient number, since it is larger than the sum of its proper divisors (19304686).

21310010 is a wasteful number, since it uses less digits than its factorization.

21310010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125377.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 21310010 is about 4616.2766381576. The cubic root of 21310010 is about 277.2434010338.

Adding to 21310010 its reverse (1001312), we get a palindrome (22311322).

The spelling of 21310010 in words is "twenty-one million, three hundred ten thousand, ten".