21043033010 has 16 divisors (see below), whose sum is σ = 37927509336. Its totient is φ = 8406091008.

The previous prime is 21043033001. The next prime is 21043033013. The reversal of 21043033010 is 1033034012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13421917609 + 7621115401 = 115853^2 + 87299^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21043033010.

It is not an unprimeable number, because it can be changed into a prime (21043033013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382327 + ... + 1397466.

Almost surely, 2^21043033010 is an apocalyptic number.

21043033010 is a deficient number, since it is larger than the sum of its proper divisors (16884476326).

21043033010 is a wasteful number, since it uses less digits than its factorization.

21043033010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780557.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21043033010 its reverse (1033034012), we get a palindrome (22076067022).

The spelling of 21043033010 in words is "twenty-one billion, forty-three million, thirty-three thousand, ten".