21235010 has 16 divisors (see below), whose sum is σ = 38288376. Its totient is φ = 8479488.

The previous prime is 21235009. The next prime is 21235013. The reversal of 21235010 is 1053212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18515809 + 2719201 = 4303^2 + 1649^2 .

It is not an unprimeable number, because it can be changed into a prime (21235013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5882 + ... + 8778.

Almost surely, 2^21235010 is an apocalyptic number.

21235010 is a deficient number, since it is larger than the sum of its proper divisors (17053366).

21235010 is a wasteful number, since it uses less digits than its factorization.

21235010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 21235010 is about 4608.1460480328. The cubic root of 21235010 is about 276.9177685157.

Adding to 21235010 its reverse (1053212), we get a palindrome (22288222).

The spelling of 21235010 in words is "twenty-one million, two hundred thirty-five thousand, ten".