21043333402 has 16 divisors (see below), whose sum is σ = 38849231232. Its totient is φ = 8324835120.

The previous prime is 21043333387. The next prime is 21043333439. The reversal of 21043333402 is 20433334012.

21043333402 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 57811174 + ... + 57811537.

It is an arithmetic number, because the mean of its divisors is an integer number (2428076952).

Almost surely, 2^21043333402 is an apocalyptic number.

21043333402 is a deficient number, since it is larger than the sum of its proper divisors (17805897830).

21043333402 is a wasteful number, since it uses less digits than its factorization.

21043333402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115622733.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21043333402 its reverse (20433334012), we get a palindrome (41476667414).

The spelling of 21043333402 in words is "twenty-one billion, forty-three million, three hundred thirty-three thousand, four hundred two".