21034010 has 16 divisors (see below), whose sum is σ = 38073672. Its totient is φ = 8366400.

The previous prime is 21034003. The next prime is 21034033. The reversal of 21034010 is 1043012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5058001 + 15976009 = 2249^2 + 3997^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21033982 and 21034000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4001 + ... + 7620.

Almost surely, 2^21034010 is an apocalyptic number.

21034010 is a deficient number, since it is larger than the sum of its proper divisors (17039662).

21034010 is a wasteful number, since it uses less digits than its factorization.

21034010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11809.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21034010 is about 4586.2849889644. The cubic root of 21034010 is about 276.0412754205.

Adding to 21034010 its reverse (1043012), we get a palindrome (22077022).

The spelling of 21034010 in words is "twenty-one million, thirty-four thousand, ten".